/* ==========================================================================
   tokens.css — 全站唯一样式来源（照抄 design-spec §12，禁止就地改数值）
   变量命名：--ze-{group}-{role}[-{variant|scale}]
   ========================================================================== */
:root {
  /* ── 主色：深墨绿 ─────────────────────────────── */
  --ze-color-primary-950: #05170F;
  --ze-color-primary-900: #0B2418;
  --ze-color-primary-800: #123528;
  --ze-color-primary-700: #1B4332;
  --ze-color-primary-600: #265C40;
  --ze-color-primary-500: #2E6B4F;
  --ze-color-primary-400: #3F8567;
  --ze-color-primary-300: #6BA68D;
  --ze-color-primary-200: #A8CFC0;
  --ze-color-primary-100: #D6E8E0;
  --ze-color-primary-50:  #EDF4F0;

  /* ── 中性：石灰白 ─────────────────────────────── */
  --ze-color-neutral-0:   #FFFFFF;
  --ze-color-neutral-25:  #FBFAF8;
  --ze-color-neutral-50:  #F5F4F0;
  --ze-color-neutral-100: #E9E7E1;
  --ze-color-neutral-200: #D6D3CB;
  --ze-color-neutral-300: #B9B5AB;
  --ze-color-neutral-400: #948F84;
  --ze-color-neutral-500: #6E6A61;
  --ze-color-neutral-600: #565349;
  --ze-color-neutral-700: #403D36;
  --ze-color-neutral-800: #2B2925;
  --ze-color-neutral-900: #1A1917;
  --ze-color-neutral-950: #0F0E0D;

  /* ── 语义文字 / 表面 / 描边 ────────────────────── */
  --ze-color-text:                 #1A1917;
  --ze-color-text-secondary:       #565349;
  --ze-color-text-muted:           #6E6A61;
  --ze-color-text-disabled:        #948F84;
  --ze-color-text-invert:          #FFFFFF;
  --ze-color-text-invert-secondary:#D6D3CB;
  --ze-color-link:                 #265C40;
  --ze-color-link-hover:           #1B4332;
  --ze-color-surface:              #FFFFFF;
  --ze-color-surface-page:         #F5F4F0;
  --ze-color-surface-alt:          #FBFAF8;
  --ze-color-surface-sunken:       #E9E7E1;
  --ze-color-surface-dark:         #0B2418;
  --ze-color-surface-dark-2:       #123528;
  --ze-color-border:               #D6D3CB;
  --ze-color-border-strong:        #B9B5AB;
  --ze-color-border-subtle:        #E9E7E1;
  --ze-color-border-dark:          #29473A;

  /* ── 辅色：石墨钢 / 数据青 ─────────────────────── */
  --ze-color-steel-600: #5A6560;
  --ze-color-steel-500: #7C8781;
  --ze-color-steel-300: #B9C1BD;
  --ze-color-steel-100: #E4E8E6;
  --ze-color-teal-700:  #245A68;
  --ze-color-teal-600:  #2F6F7E;
  --ze-color-teal-200:  #BBD8DF;
  --ze-color-teal-50:   #E9F1F3;

  /* ── 语义色 ───────────────────────────────────── */
  --ze-color-success-700: #25694B;  --ze-color-success-600: #2E7D5B;
  --ze-color-success-200: #BFDCC9;  --ze-color-success-50:  #E8F3EC;
  --ze-color-warning-700: #9A5B00;  --ze-color-warning-500: #C97C0A;
  --ze-color-warning-200: #F3D9A8;  --ze-color-warning-50:  #FDF3E3;
  --ze-color-danger-700:  #B3261E;  --ze-color-danger-200:  #F2C4BF;
  --ze-color-danger-50:   #FBECEA;
  --ze-color-info-700:    #245A68;  --ze-color-info-600:    #2F6F7E;
  --ze-color-info-200:    #BBD8DF;  --ze-color-info-50:     #E9F1F3;

  /* ── 焦点 ─────────────────────────────────────── */
  --ze-color-focus:        #2F6F7E;
  --ze-color-focus-invert: #9BD3E1;

  /* ── 金属质感（纯 CSS，仅细线与图标描边） ───────── */
  --ze-gradient-metal:   linear-gradient(135deg, #E4E8E6 0%, #B9C1BD 34%, #8C9691 50%, #DCE0DE 62%, #A7B0AB 100%);
  --ze-gradient-metal-h: linear-gradient(180deg, #F2F4F3 0%, #C6CDCA 48%, #8C9691 52%, #E4E8E6 100%);
  --ze-gradient-plate:   linear-gradient(160deg, #123528 0%, #0B2418 100%);

  /* ── 字体 ─────────────────────────────────────── */
  --ze-font-sans:   system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  --ze-font-arabic: "Noto Sans Arabic", "Segoe UI", "Dubai", "Al Bayan", "Geeza Pro", Tahoma, system-ui, Arial, sans-serif;
  --ze-font-cjk:    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --ze-font-mono:   ui-monospace, "SFMono-Regular", "Cascadia Mono", "Consolas", "Liberation Mono", monospace;

  --ze-fs-h1:      clamp(2rem, 1.45rem + 2.2vw, 3.375rem);
  --ze-fs-h2:      clamp(1.625rem, 1.3rem + 1.3vw, 2.5rem);
  --ze-fs-h3:      clamp(1.25rem, 1.15rem + 0.7vw, 1.75rem);
  --ze-fs-h4:      clamp(1.125rem, 1.05rem + 0.35vw, 1.3125rem);
  --ze-fs-h5:      1.0625rem;
  --ze-fs-h6:      1rem;
  --ze-fs-lead:    clamp(1.0625rem, 1rem + 0.4vw, 1.1875rem);
  --ze-fs-body:    1rem;
  --ze-fs-sm:      0.875rem;
  --ze-fs-xs:      0.8125rem;
  --ze-fs-2xs:     0.75rem;
  --ze-fs-eyebrow: 0.75rem;
  --ze-fs-metric:  clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem);

  --ze-lh-tight:   1.2;
  --ze-lh-snug:    1.4;
  --ze-lh-body:    1.75;
  --ze-lh-relaxed: 1.85;

  --ze-fw-regular: 400;
  --ze-fw-medium:  500;
  --ze-fw-semibold:600;
  --ze-fw-bold:    700;

  /* ── 间距（4px 基准） ──────────────────────────── */
  --ze-space-1:4px;   --ze-space-2:8px;   --ze-space-3:12px;
  --ze-space-4:16px;  --ze-space-5:20px;  --ze-space-6:24px;
  --ze-space-8:32px;  --ze-space-10:40px; --ze-space-12:48px;
  --ze-space-16:64px; --ze-space-20:80px; --ze-space-24:96px;
  --ze-space-32:128px;

  /* ── 容器 / 栅格 / 区块 ────────────────────────── */
  --ze-container-max:    1280px;
  --ze-container-narrow: 960px;
  --ze-container-prose:  68ch;
  --ze-page-padding-inline: 20px;
  --ze-section-y:        clamp(48px, 6vw, 96px);
  --ze-section-y-tight:  clamp(32px, 4vw, 64px);
  --ze-grid-cols:   4;
  --ze-grid-gutter: 16px;

  /* ── 组件尺寸 ──────────────────────────────────── */
  --ze-header-block-size:        72px;
  --ze-header-utility-block-size:40px;
  --ze-btn-block-size:           48px;
  --ze-btn-sm-block-size:        40px;
  --ze-input-block-size:         48px;
  --ze-tap-min:                  44px;
  --ze-tap-min-mobile:           48px;
  --ze-fab-size:                 56px;
  --ze-stickybar-block-size:     56px;
  --ze-drawer-inline-size:       360px;

  /* ── 圆角 / 阴影 / 动效 / 层级 ─────────────────── */
  --ze-radius-xs:2px;  --ze-radius-sm:4px;  --ze-radius-md:8px;
  --ze-radius-pill:999px; --ze-radius-full:50%;

  --ze-shadow-1:   0 1px 2px rgba(11, 36, 24, .06);
  --ze-shadow-2:   0 2px 8px rgba(11, 36, 24, .08);
  --ze-shadow-3:   0 8px 24px rgba(11, 36, 24, .12);
  --ze-shadow-fab: 0 6px 20px rgba(11, 36, 24, .28);

  --ze-dur-fast: 120ms;
  --ze-dur-base: 200ms;
  --ze-ease: cubic-bezier(.2, .6, .2, 1);

  --ze-z-header:100; --ze-z-fab:300; --ze-z-overlay:400;
  --ze-z-drawer:500; --ze-z-toast:600;
}

/* 断点覆写（就这 4 条） */
@media (min-width: 640px) {
  :root { --ze-page-padding-inline:24px; --ze-grid-cols:8;  --ze-grid-gutter:20px;
          --ze-section-y:clamp(48px, 6vw, 64px); --ze-drawer-inline-size:360px; }
}
@media (min-width: 900px) {
  :root { --ze-page-padding-inline:32px; --ze-grid-cols:12; --ze-grid-gutter:24px;
          --ze-section-y:clamp(64px, 5vw, 80px); }
}
@media (min-width: 1200px) {
  :root { --ze-page-padding-inline:40px; --ze-section-y:96px; }
}
@media (min-width: 1440px) {
  :root { --ze-section-y:96px; }
}

/* 阿拉伯语排版覆写（由 lang 驱动） */
html:lang(ar) {
  --ze-lh-body: 1.8;
  --ze-lh-snug: 1.5;
  letter-spacing: 0;
  text-transform: none;
}

/* 尊重减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}


/* ==========================================================================
   base.css — 重置、字体栈、焦点环、工具类（.u-*）
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ze-color-surface-page);
  color: var(--ze-color-text);
  font-family: var(--ze-font-sans);
  font-size: var(--ze-fs-body);
  line-height: var(--ze-lh-body);
  font-weight: var(--ze-fw-regular);
  -webkit-font-smoothing: antialiased;
}
html:lang(ar) body { font-family: var(--ze-font-arabic); }

h1, h2, h3, h4, h5, h6 { margin: 0; line-height: var(--ze-lh-tight); font-weight: var(--ze-fw-bold); }
h1 { font-size: var(--ze-fs-h1); }
h2 { font-size: var(--ze-fs-h2); }
h3 { font-size: var(--ze-fs-h3); }
h4 { font-size: var(--ze-fs-h4); }
h5 { font-size: var(--ze-fs-h5); }
h6 { font-size: var(--ze-fs-h6); }

p { margin: 0 0 var(--ze-space-4); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

a { color: var(--ze-color-link); text-decoration: none; }
a:hover { color: var(--ze-color-link-hover); text-decoration: underline; }

img, svg { max-inline-size: 100%; }

button { font: inherit; color: inherit; }

table { border-collapse: collapse; inline-size: 100%; }

/* 焦点可见性（design-spec §9.1） */
:focus-visible {
  outline: 3px solid var(--ze-color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}
.u-on-dark :focus-visible,
.c-drawer :focus-visible,
.l-footer :focus-visible {
  outline-color: var(--ze-color-focus-invert);
}

/* 跳转链接 */
.u-skip {
  position: absolute; inset-block-start: 8px; inset-inline-start: 8px;
  z-index: 999; padding: 12px 20px; background: var(--ze-color-surface);
  color: var(--ze-color-primary-700); border: 2px solid var(--ze-color-primary-700);
  border-radius: var(--ze-radius-sm); font-weight: var(--ze-fw-semibold);
  transform: translateY(-200%);
}
.u-skip:focus { transform: translateY(0); }

/* 视觉隐藏（保留语义，屏幕阅读器可读） */
.u-visually-hidden {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

.u-mono { font-family: var(--ze-font-mono); font-variant-numeric: tabular-nums; }
.u-nums { font-variant-numeric: tabular-nums; }
.u-muted { color: var(--ze-color-text-muted); }
.u-nowrap { white-space: nowrap; }
.u-center { text-align: center; }
.u-on-dark { color: var(--ze-color-text-invert); }
.u-stack { display: flex; flex-direction: column; gap: var(--ze-space-4); }
.u-hidden { display: none !important; }

/* 图标 */
.u-icon { flex-shrink: 0; display: inline-block; vertical-align: middle; }

/* ── 占位图（design-spec §10，纯 CSS，不生成图片文件） ───────────────────── */
.u-ph {
  position: relative; overflow: hidden;
  background: var(--ze-color-surface-sunken);
  border-radius: var(--ze-radius-sm);
  display: block;
}
.u-ph__note {
  position: absolute; inset-block-start: 0; inset-inline-start: 0;
  padding: 6px 8px; background: rgba(255,255,255,.82);
  font-size: var(--ze-fs-2xs); color: var(--ze-color-text-muted);
  z-index: 2; max-inline-size: 100%;
}

/* 真实图片替换占位框：铺满 figure，盖住占位渐变/纹理 */
.u-ph__img {
  position: absolute; inset: 0; inline-size: 100%; block-size: 100%;
  object-fit: cover; z-index: 1;
}

/* P1 厂区 / 产线 */
.u-ph--p1 { background: linear-gradient(160deg, var(--ze-color-primary-800) 0%, var(--ze-color-primary-900) 100%); border-block-start: 1px solid var(--ze-color-steel-500); }
.u-ph--p1::after {
  content: ''; position: absolute; inset-block-end: 0; inset-inline: 0; block-size: 38%;
  background: linear-gradient(90deg, var(--ze-color-primary-700) 0 18%, transparent 18% 22%, var(--ze-color-primary-700) 22% 46%, transparent 46% 50%, var(--ze-color-primary-900) 50% 78%, transparent 78% 82%, var(--ze-color-primary-700) 82% 100%);
}

/* P2 粉体微距 */
.u-ph--p2 { background: var(--ze-color-surface-sunken); }
.u-ph--p2::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(27,67,50,.07) 0 3px, transparent 4px),
    radial-gradient(circle at 62% 18%, rgba(27,67,50,.05) 0 5px, transparent 6px),
    radial-gradient(circle at 41% 71%, rgba(27,67,50,.06) 0 4px, transparent 5px),
    radial-gradient(circle at 80% 62%, rgba(27,67,50,.05) 0 6px, transparent 7px);
  background-size: 120px 120px;
}

/* P3 实验室 / 仪器 */
.u-ph--p3 { background: var(--ze-color-primary-50); }
.u-ph--p3::before {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 26px, rgba(90,101,96,.14) 26px 28px);
}

/* P4 包装 */
.u-ph--p4 { background: var(--ze-color-surface-page); display: grid; place-items: center; }
.u-ph--p4::before {
  content: ''; inline-size: 52%; aspect-ratio: 3/4; border-radius: 2px; background: var(--ze-color-neutral-200);
  border-block-start: 6px solid var(--ze-color-border-strong);
}

/* P5 文档封面 */
.u-ph--p5 { background: linear-gradient(160deg, var(--ze-color-primary-800) 0%, var(--ze-color-primary-900) 100%); }

/* P6 抽象场景（应用页 Hero） */
.u-ph--p6 { background: linear-gradient(160deg, var(--ze-color-primary-800) 0%, var(--ze-color-primary-900) 100%); display: grid; place-items: center; }

/* P8 地图 */
.u-ph--p8 { background: var(--ze-color-primary-50); }

.u-ph__ratio-16x7_5 { aspect-ratio: 16 / 7.5; }
.u-ph__ratio-16x6 { aspect-ratio: 16 / 6; }
.u-ph__ratio-4x3 { aspect-ratio: 4 / 3; }
.u-ph__ratio-16x9 { aspect-ratio: 16 / 9; }
.u-ph__ratio-a4 { aspect-ratio: 0.707; }


/* ==========================================================================
   layout.css — .l-container / .l-grid / .l-section / .l-prose
   ========================================================================== */

.l-container {
  inline-size: 100%;
  max-inline-size: calc(var(--ze-container-max) + var(--ze-page-padding-inline) * 2);
  margin-inline: auto;
  padding-inline: var(--ze-page-padding-inline);
}
.l-container--narrow { max-inline-size: calc(var(--ze-container-narrow) + var(--ze-page-padding-inline) * 2); }
.l-container--prose  { max-inline-size: calc(var(--ze-container-prose) + var(--ze-page-padding-inline) * 2); }

.l-grid { display: grid; gap: var(--ze-grid-gutter); }
.l-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.l-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.l-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 899px) {
  .l-grid--3, .l-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 639px) {
  .l-grid--2, .l-grid--3, .l-grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* 12 栏工作栅格（≥900 生效） */
.l-cols { display: grid; gap: var(--ze-grid-gutter); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) {
  .l-cols { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .l-col-4  { grid-column: span 4; }
  .l-col-5  { grid-column: span 5; }
  .l-col-6  { grid-column: span 6; }
  .l-col-7  { grid-column: span 7; }
  .l-col-8  { grid-column: span 8; }
  .l-col-12 { grid-column: span 12; }
}

.l-section { padding-block: var(--ze-section-y); }
.l-section--tight { padding-block: var(--ze-section-y-tight); }
.l-section--alt { background: var(--ze-color-surface-alt); }
.l-section--page { background: var(--ze-color-surface-page); }
.l-section--dark { background: var(--ze-color-surface-dark); color: var(--ze-color-text-invert); }
.l-section--plate { background: var(--ze-gradient-plate); color: var(--ze-color-text-invert); }

.l-prose { max-inline-size: var(--ze-container-prose); }
.l-prose h2 { font-size: var(--ze-fs-h3); margin-block: var(--ze-space-8) var(--ze-space-4); }
.l-prose h3 { font-size: var(--ze-fs-h4); margin-block: var(--ze-space-6) var(--ze-space-3); }
.l-prose p, .l-prose li { font-size: var(--ze-fs-body); line-height: var(--ze-lh-body); }
.l-prose ul { display: grid; gap: var(--ze-space-2); margin-block: var(--ze-space-4); }
.l-prose li { padding-inline-start: var(--ze-space-6); position: relative; }
.l-prose li::before {
  content: ''; position: absolute; inset-inline-start: 0; inset-block-start: .72em;
  inline-size: 6px; block-size: 6px; border-radius: var(--ze-radius-full);
  background: var(--ze-color-primary-700);
}

.l-header {
  position: sticky; inset-block-start: 0; z-index: var(--ze-z-header);
  background: var(--ze-color-surface);
}
.l-main { display: block; }
.l-main:focus { outline: none; }

.l-footer { background: var(--ze-color-surface-dark); color: var(--ze-color-text-invert); }

.l-stack { display: grid; gap: var(--ze-space-4); }
.l-stack--8 { gap: var(--ze-space-8); }
.l-stack--6 { gap: var(--ze-space-6); }

.l-cluster { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); align-items: center; }

/* 移动端底部常驻条给页面留出空间 */
@media (max-width: 899px) {
  body.has-stickybar { padding-block-end: calc(var(--ze-stickybar-block-size) + env(safe-area-inset-bottom, 0px)); }
}
body.has-drawer-open { overflow: hidden; }


/* ==========================================================================
   components.css — design-spec §5 全部组件（.c-*）
   全站只用逻辑属性：禁止 left/right、margin-left/right、text-align:left/right
   ========================================================================== */

/* ── 5.1 按钮 ─────────────────────────────────────────────────────────── */
.c-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--ze-space-2);
  min-block-size: var(--ze-btn-block-size);
  padding-inline: var(--ze-space-6); padding-block: var(--ze-space-3);
  font-size: var(--ze-fs-body); font-weight: var(--ze-fw-semibold);
  border: 1px solid transparent; border-radius: var(--ze-radius-sm);
  white-space: normal; text-align: center; cursor: pointer;
  text-decoration: none;
  transition: background-color var(--ze-dur-fast) var(--ze-ease),
              border-color var(--ze-dur-fast) var(--ze-ease),
              color var(--ze-dur-fast) var(--ze-ease);
}
.c-btn:hover { text-decoration: none; }
.c-btn .u-icon { inline-size: 20px; block-size: 20px; }
.c-btn[aria-busy="true"] { pointer-events: none; }
.c-btn--sm { min-block-size: var(--ze-btn-sm-block-size); padding-inline: var(--ze-space-5); font-size: var(--ze-fs-sm); }
.c-btn--block { inline-size: 100%; }

.c-btn--primary { background: var(--ze-color-primary-700); color: var(--ze-color-text-invert); border-color: var(--ze-color-primary-700); }
.c-btn--primary:hover { background: var(--ze-color-primary-800); color: var(--ze-color-text-invert); }
.c-btn--primary:active { background: var(--ze-color-primary-900); transform: translateY(1px); }

.c-btn--secondary { background: var(--ze-color-surface); color: var(--ze-color-primary-700); border-color: var(--ze-color-primary-700); }
.c-btn--secondary:hover { background: var(--ze-color-primary-50); border-color: var(--ze-color-primary-800); color: var(--ze-color-primary-800); }
.c-btn--secondary:active { background: var(--ze-color-primary-100); }

.c-btn--text { background: transparent; color: var(--ze-color-link); border-color: transparent; padding-inline: var(--ze-space-2); }
.c-btn--text:hover { color: var(--ze-color-link-hover); text-decoration: underline; text-underline-offset: 3px; }

.c-btn--danger-text { background: transparent; color: var(--ze-color-danger-700); border-color: transparent; padding-inline: var(--ze-space-2); }
.c-btn--danger-text:hover { background: var(--ze-color-danger-50); }

/* 深色底上的主按钮 */
.c-btn--primary-on-dark { background: var(--ze-color-surface); color: var(--ze-color-primary-900); border-color: var(--ze-color-text-invert); }
.c-btn--primary-on-dark:hover { background: var(--ze-color-primary-100); color: var(--ze-color-primary-900); }
.c-btn--primary-on-dark:active { background: var(--ze-color-primary-200); }

.c-btn--outline-on-dark { background: transparent; color: var(--ze-color-text-invert); border-color: var(--ze-color-primary-300); }
.c-btn--outline-on-dark:hover { background: var(--ze-color-primary-800); color: var(--ze-color-text-invert); }

.c-btn[disabled], .c-btn.is-disabled {
  background: var(--ze-color-surface-sunken); color: var(--ze-color-text-muted);
  border-color: var(--ze-color-border); cursor: not-allowed;
}
.c-btn[disabled]:hover, .c-btn.is-disabled:hover { background: var(--ze-color-surface-sunken); color: var(--ze-color-text-muted); }

/* ── 5.2 表单控件 ─────────────────────────────────────────────────────── */
.c-field { display: flex; flex-direction: column; gap: var(--ze-space-2); margin-block-end: var(--ze-space-6); }
.c-field__label { font-size: var(--ze-fs-sm); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text); }
.c-field__req { color: var(--ze-color-danger-700); margin-inline-start: 2px; }
.c-field__hint { font-size: 13px; color: var(--ze-color-text-secondary); }
.c-field__error { display: flex; gap: 6px; align-items: flex-start; font-size: var(--ze-fs-sm); font-weight: var(--ze-fw-medium); color: var(--ze-color-danger-700); }
.c-field__error:empty { display: none; }
.c-field--invalid .c-input, .c-field--invalid .c-select, .c-field--invalid .c-textarea {
  border: 2px solid var(--ze-color-danger-700);
}

.c-input, .c-select, .c-textarea {
  inline-size: 100%; min-block-size: var(--ze-input-block-size);
  padding: 12px 16px; background: var(--ze-color-surface);
  border: 1px solid var(--ze-color-border-strong); border-radius: var(--ze-radius-sm);
  font-family: inherit; font-size: var(--ze-fs-body); color: var(--ze-color-text);
}
.c-input:hover, .c-select:hover, .c-textarea:hover { border-color: var(--ze-color-text-secondary); }
.c-input:focus, .c-select:focus, .c-textarea:focus {
  outline: 3px solid var(--ze-color-focus); outline-offset: 2px;
  border: 2px solid var(--ze-color-primary-700); padding: 11px 15px;
}
.c-input::placeholder, .c-textarea::placeholder { color: var(--ze-color-text-muted); font-style: normal; }
.c-input:disabled, .c-select:disabled { background: var(--ze-color-surface-sunken); border-color: var(--ze-color-border); color: var(--ze-color-text-disabled); }
.c-textarea { min-block-size: 120px; resize: vertical; }
.c-select { appearance: none; -webkit-appearance: none; padding-inline-end: 44px; background-image: none; }
/* 多选（productKeys）：恢复原生滚动，选项在圆角容器内呼吸 */
.c-select[multiple] { appearance: auto; -webkit-appearance: auto; padding-inline-end: 12px; block-size: auto; min-block-size: 0; padding-block: 6px; }
.c-select[multiple] option { padding: 6px 8px; border-radius: var(--ze-radius-xs); }
.c-select-wrap { position: relative; display: block; }
.c-select-wrap > .u-icon {
  position: absolute; inset-inline-end: 16px; inset-block-start: 50%; transform: translateY(-50%);
  inline-size: 20px; block-size: 20px; color: var(--ze-color-text-secondary); pointer-events: none;
}
.c-check { display: flex; align-items: flex-start; gap: var(--ze-space-3); min-block-size: var(--ze-tap-min); padding-block: var(--ze-space-2); cursor: pointer; }
.c-check input[type="checkbox"] {
  inline-size: 20px; block-size: 20px; margin: 2px 0 0; flex-shrink: 0;
  accent-color: var(--ze-color-primary-700);
}
.c-check__text { font-size: var(--ze-fs-sm); line-height: var(--ze-lh-snug); }
.c-form { inline-size: 100%; max-inline-size: 560px; }
.c-form__details { border-block: 1px solid var(--ze-color-border-subtle); padding-block: var(--ze-space-4); margin-block-end: var(--ze-space-6); }
.c-form__details > summary {
  cursor: pointer; min-block-size: var(--ze-tap-min); display: flex; align-items: center; gap: var(--ze-space-2);
  font-size: var(--ze-fs-sm); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text);
}
.c-form__details > summary::-webkit-details-marker { display: none; }
.c-form__details[open] > summary .u-icon { transform: rotate(180deg); }
.c-form__actions { display: grid; gap: var(--ze-space-4); }
.c-file {
  display: grid; place-items: center; gap: var(--ze-space-2); text-align: center;
  min-block-size: 96px; padding: var(--ze-space-6);
  border: 2px dashed var(--ze-color-border-strong); border-radius: var(--ze-radius-sm);
  font-size: var(--ze-fs-sm); color: var(--ze-color-text-secondary);
}
.c-file:hover { border-color: var(--ze-color-text-secondary); background: var(--ze-color-surface-alt); }

/* ── Alert / Banner ───────────────────────────────────────────────────── */
.c-alert { display: flex; gap: var(--ze-space-3); align-items: flex-start; padding: var(--ze-space-5) var(--ze-space-6); border-radius: var(--ze-radius-sm); }
.c-alert > .u-icon { flex-shrink: 0; margin-block-start: 2px; inline-size: 20px; block-size: 20px; }
.c-alert__title { font-size: var(--ze-fs-body); font-weight: var(--ze-fw-semibold); margin-block-end: var(--ze-space-2); }
.c-alert__body { font-size: var(--ze-fs-body); }
.c-alert__actions { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); margin-block-start: var(--ze-space-4); }
.c-alert--info { background: var(--ze-color-info-50); border-inline-start: 4px solid var(--ze-color-info-700); color: var(--ze-color-text); }
.c-alert--info > .u-icon, .c-alert--info .c-alert__title { color: var(--ze-color-info-700); }
.c-alert--success { background: var(--ze-color-success-50); border-inline-start: 4px solid var(--ze-color-success-700); }
.c-alert--success > .u-icon, .c-alert--success .c-alert__title { color: var(--ze-color-success-700); }
.c-alert--warning { background: var(--ze-color-warning-50); border-inline-start: 4px solid var(--ze-color-warning-700); }
.c-alert--warning > .u-icon, .c-alert--warning .c-alert__title { color: var(--ze-color-warning-700); }
.c-alert--danger { background: var(--ze-color-danger-50); border-inline-start: 4px solid var(--ze-color-danger-700); }
.c-alert--danger > .u-icon, .c-alert--danger .c-alert__title { color: var(--ze-color-danger-700); }

.c-banner { padding: var(--ze-space-2) var(--ze-page-padding-inline); font-size: 13px; }
.c-banner--demo {
  background: var(--ze-color-warning-50); border-block-end: 1px solid var(--ze-color-warning-500);
  color: var(--ze-color-warning-700);
  display: flex; align-items: center; gap: var(--ze-space-2);
}
.c-banner--demo > .u-icon { inline-size: 16px; block-size: 16px; flex-shrink: 0; }
.c-banner--placeholder {
  background: var(--ze-color-warning-50); color: var(--ze-color-warning-700);
  display: flex; align-items: center; gap: var(--ze-space-2);
}
.c-banner--placeholder > .u-icon { inline-size: 16px; block-size: 16px; flex-shrink: 0; }
.c-banner__close { margin-inline-start: auto; min-block-size: var(--ze-tap-min); min-inline-size: var(--ze-tap-min); display: grid; place-items: center; background: transparent; border: 0; cursor: pointer; color: inherit; }

/* ── 5.13 chip ────────────────────────────────────────────────────────── */
.c-chip { display: inline-flex; align-items: center; gap: 4px; font-size: var(--ze-fs-2xs); line-height: 1.4; padding: 4px 10px; border-radius: var(--ze-radius-pill); }
.c-chip .u-icon { inline-size: 12px; block-size: 12px; }
.c-chip--series { background: var(--ze-color-primary-50); color: var(--ze-color-primary-700); font-weight: var(--ze-fw-semibold); }
.c-chip--code { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border-strong); color: var(--ze-color-neutral-700); font-family: var(--ze-font-mono); border-radius: var(--ze-radius-xs); padding: 4px 8px; }
.c-chip--neutral { background: var(--ze-color-neutral-200); color: var(--ze-color-neutral-700); font-weight: var(--ze-fw-medium); }
.c-chip--success { background: var(--ze-color-success-50); color: var(--ze-color-success-700); font-weight: var(--ze-fw-semibold); }
.c-chip--warning { background: var(--ze-color-warning-50); color: var(--ze-color-warning-700); font-weight: var(--ze-fw-semibold); }
.c-chip--danger { background: var(--ze-color-danger-50); color: var(--ze-color-danger-700); font-weight: var(--ze-fw-semibold); }
.c-chip--info { background: var(--ze-color-info-50); color: var(--ze-color-info-700); font-weight: var(--ze-fw-semibold); }
a.c-chip--filter { min-block-size: 32px; background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); color: var(--ze-color-neutral-700); text-decoration: none; }
a.c-chip--filter:hover { border-color: var(--ze-color-primary-700); background: var(--ze-color-primary-50); text-decoration: none; }
a.c-chip--filter.is-active { background: var(--ze-color-primary-50); border-color: var(--ze-color-primary-700); color: var(--ze-color-primary-700); }

/* ── 5.3 产品卡片 ─────────────────────────────────────────────────────── */
.c-card { position: relative; background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); display: flex; flex-direction: column; }
.c-card__media { aspect-ratio: 4 / 3; border-start-start-radius: var(--ze-radius-sm); border-start-end-radius: var(--ze-radius-sm); overflow: hidden; }
.c-card__body { padding: clamp(16px, 2vw, 24px); display: flex; flex-direction: column; gap: var(--ze-space-2); flex: 1; }
.c-card__title { font-size: var(--ze-fs-h4); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text); line-height: var(--ze-lh-snug); }
.c-card--grade:hover { border-color: var(--ze-color-primary-700); box-shadow: var(--ze-shadow-2); transform: translateY(-2px); }
.c-card__link::after { content: ''; position: absolute; inset: 0; }
.c-card:focus-within { outline: 3px solid var(--ze-color-focus); outline-offset: 3px; }
.c-card__meta { display: flex; flex-wrap: wrap; gap: var(--ze-space-2) var(--ze-space-4); font-family: var(--ze-font-mono); font-size: 15px; color: var(--ze-color-text-secondary); font-variant-numeric: tabular-nums; }
.c-card__desc { font-size: var(--ze-fs-sm); color: var(--ze-color-text-secondary); line-height: var(--ze-lh-body); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.c-card__foot { margin-block-start: auto; padding-block-start: var(--ze-space-3); border-block-start: 1px solid var(--ze-color-border-subtle); font-size: 15px; font-weight: var(--ze-fw-semibold); color: var(--ze-color-link); }
.c-card--grade-sm .c-card__body { padding: var(--ze-space-4); }

/* ── 5.4 系列卡片 ─────────────────────────────────────────────────────── */
.c-card--series { min-block-size: 280px; border-block-start: 2px solid transparent; border-image: var(--ze-gradient-metal) 2; }
.c-card--series:hover { transform: translateY(-3px); box-shadow: var(--ze-shadow-3); border-color: var(--ze-color-primary-700); }
.c-card--series .c-card__title { font-size: var(--ze-fs-h3); font-weight: var(--ze-fw-bold); }
.c-card--series .c-card__body { gap: var(--ze-space-3); }

/* ── 5.5 应用行业卡片 ─────────────────────────────────────────────────── */
.c-card--app { padding: var(--ze-space-5); min-block-size: 160px; gap: var(--ze-space-3); }
.c-card--app:hover { background: var(--ze-color-primary-50); border-color: var(--ze-color-primary-700); }
.c-card--app .c-card__body { padding: 0; }
.c-card--app .u-icon--lg { inline-size: 48px; block-size: 48px; color: var(--ze-color-primary-700); }
.c-card--app .c-card__desc { -webkit-line-clamp: 2; }
.c-card--app .c-card__foot { border: 0; padding: 0; }
.c-card--app-sm { background: transparent; border: 0; min-block-size: 0; padding: 0; }
.c-card--app-sm .c-card__body { padding: 0; }
.c-card--app-sm .u-icon { inline-size: 32px; block-size: 32px; color: var(--ze-color-primary-700); }

/* ── 5.6 规格表（全站核心资产） ───────────────────────────────────────── */
.c-spec__scroll { overflow-x: auto; padding: 3px; }
.c-spec { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-xs); overflow: hidden; inline-size: 100%; }
.c-spec caption { text-align: start; }
.c-spec thead { background: var(--ze-color-primary-800); border-block-start: 1px solid transparent; border-image: var(--ze-gradient-metal-h) 1; }
.c-spec thead th {
  background: var(--ze-color-primary-800); color: var(--ze-color-text-invert);
  font-size: 13px; font-weight: var(--ze-fw-semibold); letter-spacing: .02em;
  text-transform: uppercase; text-align: start;
  padding: 12px 16px; white-space: nowrap;
}
html:lang(ar) .c-spec thead th { text-transform: none; letter-spacing: 0; }
.c-spec td, .c-spec tbody th {
  padding: 12px 16px; border-block-end: 1px solid var(--ze-color-border-subtle);
  vertical-align: top; text-align: start;
}
.c-spec tbody tr { min-block-size: 48px; }
.c-spec tbody tr:nth-child(even) { background: var(--ze-color-surface-alt); }
.c-spec tbody tr:hover { background: var(--ze-color-primary-50); }
.c-spec tbody tr:hover .c-spec__cell--guaranteed { background: var(--ze-color-primary-100); }
.c-spec th[scope="row"] { font-size: var(--ze-fs-body); font-weight: var(--ze-fw-medium); color: var(--ze-color-text); white-space: normal; }
.c-spec__cell { font-family: var(--ze-font-mono); font-size: 15px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.c-spec__cell--guaranteed { background: var(--ze-color-primary-50); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text); }
.c-spec__cell--typical { font-weight: var(--ze-fw-regular); color: var(--ze-color-neutral-700); }
.c-spec__cell--method { background: var(--ze-color-surface-alt); font-family: var(--ze-font-sans); font-size: 13px; color: var(--ze-color-text-secondary); white-space: normal; }
.c-spec__cell--tbd { color: var(--ze-color-text-muted); font-style: italic; font-weight: var(--ze-fw-regular); }
.c-spec__legend { display: flex; flex-wrap: wrap; gap: var(--ze-space-2) var(--ze-space-6); font-size: var(--ze-fs-2xs); color: var(--ze-color-text-secondary); margin-block-end: var(--ze-space-3); }
.c-spec__note { font-size: var(--ze-fs-body); color: var(--ze-color-text-secondary); max-inline-size: var(--ze-container-prose); margin-block-start: var(--ze-space-4); }

/* 三档响应式（design-spec §6.4）
   <640   堆叠卡片式：thead 视觉隐藏但保留语义，tr → 卡片，td::before 显示列名
   640–899 横向滚动 + 首列 sticky
   ≥900   完整四列 */
@media (max-width: 639px) {
  .c-spec__scroll { overflow-x: visible; }
  .c-spec, .c-spec tbody, .c-spec tr, .c-spec td, .c-spec tbody th { display: block; inline-size: 100%; }
  .c-spec thead { position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
  .c-spec { border: 0; background: transparent; }
  .c-spec tbody tr {
    border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm);
    margin-block: var(--ze-space-3); background: var(--ze-color-surface); padding: var(--ze-space-2);
  }
  .c-spec tbody tr:nth-child(even) { background: var(--ze-color-surface); }
  .c-spec td, .c-spec tbody th { border-block-end: 0; padding: 6px 12px; }
  .c-spec td::before {
    content: attr(data-label); display: block;
    font-family: var(--ze-font-sans); font-size: 13px; font-weight: var(--ze-fw-semibold);
    color: var(--ze-color-text-secondary);
  }
  .c-spec tbody th { font-weight: var(--ze-fw-semibold); font-size: var(--ze-fs-body); }
  .c-spec__cell--guaranteed, .c-spec__cell--method { background: transparent; }
}
@media (min-width: 640px) and (max-width: 899px) {
  .c-spec { min-inline-size: 720px; }
  .c-spec th[scope="row"] { position: sticky; inset-inline-start: 0; background: var(--ze-color-surface); box-shadow: 1px 0 0 var(--ze-color-border); z-index: 1; }
}

/* ── 5.7 文件下载条 ───────────────────────────────────────────────────── */
.c-download {
  display: flex; align-items: center; gap: var(--ze-space-3);
  min-block-size: 72px; padding: var(--ze-space-4);
  background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm);
}
.c-download__icon { inline-size: 24px; block-size: 24px; color: var(--ze-color-primary-700); flex-shrink: 0; }
.c-download__main { min-inline-size: 0; flex: 1; }
.c-download__name { font-size: 15px; font-weight: var(--ze-fw-medium); color: var(--ze-color-text); overflow-wrap: anywhere; }
.c-download__meta { font-size: 13px; color: var(--ze-color-text-secondary); }
.c-download__sep { margin-inline: 6px; color: var(--ze-color-border-strong); }
.c-download__actions { display: flex; align-items: center; gap: var(--ze-space-2); flex-shrink: 0; }
.c-download--gated .c-download__icon { color: var(--ze-color-text-muted); }
@media (max-width: 639px) {
  .c-download { flex-wrap: wrap; }
  .c-download__actions { inline-size: 100%; }
}

/* ── 5.8 认证占位卡 ───────────────────────────────────────────────────── */
.c-cert-grid { display: grid; gap: var(--ze-space-4); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .c-cert-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1200px) { .c-cert-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.c-cert {
  min-inline-size: 0; min-block-size: 96px; padding: var(--ze-space-5) var(--ze-space-4);
  display: flex; flex-direction: column; gap: var(--ze-space-2); justify-content: center;
  border-radius: var(--ze-radius-sm);
}
.c-cert--pending { background: var(--ze-color-surface-sunken); border: 1px dashed var(--ze-color-border-strong); }
.c-cert--pending .u-icon { inline-size: 24px; block-size: 24px; color: var(--ze-color-text-disabled); }
.c-cert--pending-dark { background: var(--ze-color-surface-dark-2); border: 1px dashed var(--ze-color-border-dark); color: var(--ze-color-text-invert-secondary); }
.c-cert--pending-dark .u-icon { color: var(--ze-color-primary-300); }
.c-cert--pending-dark .c-chip--neutral { background: var(--ze-color-border-dark); color: var(--ze-color-text-invert-secondary); }
.c-cert--badge { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); }
/* 紧凑形态（首页信任条）：只出名称 + 待确认标签 */
.c-cert--compact { min-block-size: 0; padding: var(--ze-space-2) var(--ze-space-3); }
.c-cert--compact .c-cert__name { font-size: 14px; }
.c-cert-grid--compact { gap: var(--ze-space-2); }
@media (min-width: 640px) { .c-cert-grid--compact { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .c-cert-grid--compact { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.c-cert--badge-dark { background: var(--ze-color-surface-dark-2); border: 1px solid var(--ze-color-border-dark); color: var(--ze-color-text-invert); }
.c-cert__name { font-size: 15px; font-weight: var(--ze-fw-semibold); color: var(--ze-color-neutral-700); }
.c-cert--badge-dark .c-cert__name, .c-cert--pending-dark .c-cert__name { color: var(--ze-color-text-invert); }
.c-cert__scope { font-size: 13px; color: var(--ze-color-text-secondary); }
.c-cert--badge-dark .c-cert__scope, .c-cert--pending-dark .c-cert__scope { color: var(--ze-color-text-invert-secondary); }
.c-cert__row { display: flex; align-items: center; gap: var(--ze-space-2); flex-wrap: wrap; }

/* ── 5.9 / 5.10 导航 ──────────────────────────────────────────────────── */
.c-utility {
  block-size: var(--ze-header-utility-block-size); background: var(--ze-color-primary-950);
  color: var(--ze-color-text-invert-secondary); font-size: var(--ze-fs-2xs);
  display: flex; align-items: center; gap: var(--ze-space-4);
}
.c-utility a { color: var(--ze-color-text-invert-secondary); display: inline-flex; align-items: center; gap: 6px; }
.c-utility a:hover { color: var(--ze-color-text-invert); }
.c-utility .u-icon { inline-size: 14px; block-size: 14px; }
.c-utility__spacer { margin-inline-start: auto; }
.c-utility__item { display: inline-flex; align-items: center; gap: 6px; }

.c-nav { block-size: var(--ze-header-block-size); background: var(--ze-color-surface); display: flex; align-items: center; gap: var(--ze-space-2); padding-inline: var(--ze-page-padding-inline); }
.l-header.is-scrolled .c-nav { box-shadow: var(--ze-shadow-1); }
.c-nav__brand { display: inline-flex; align-items: center; text-decoration: none; padding-block: 22px; }
.c-nav__logo { block-size: 28px; inline-size: auto; color: var(--ze-color-primary-700); }
.c-nav__list { display: flex; align-items: center; gap: 4px; margin: 0; }
.c-nav__item { position: relative; }
.c-nav__link {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 14px; font-weight: var(--ze-fw-medium); color: var(--ze-color-neutral-700);
  padding: 8px 12px; border-radius: var(--ze-radius-sm); min-block-size: 40px;
  background: transparent; border: 0; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.c-nav__link:hover { color: var(--ze-color-primary-700); background: var(--ze-color-primary-50); text-decoration: none; }
.c-nav__link[aria-current="page"] { color: var(--ze-color-primary-700); font-weight: var(--ze-fw-semibold); box-shadow: inset 0 -2px 0 var(--ze-color-primary-700); }
.c-nav__link .u-icon--chev { inline-size: 12px; block-size: 12px; }
.c-nav__item.is-open > .c-nav__link .u-icon--chev { transform: rotate(180deg); }
.c-nav__menu {
  position: absolute; inset-block-start: var(--ze-header-block-size); inset-inline-start: 0;
  min-inline-size: 240px; background: var(--ze-color-surface); border: 1px solid var(--ze-color-border);
  box-shadow: var(--ze-shadow-3); border-radius: var(--ze-radius-sm); padding-block: var(--ze-space-2);
  display: none; z-index: 2;
}
.c-nav__item:hover .c-nav__menu, .c-nav__item:focus-within .c-nav__menu, .c-nav__item.is-open .c-nav__menu { display: block; }
.c-nav__menu a { display: block; padding: 10px 16px; font-size: 15px; color: var(--ze-color-neutral-700); min-block-size: 40px; }
.c-nav__menu a:hover { background: var(--ze-color-primary-50); color: var(--ze-color-primary-700); text-decoration: none; }
.c-nav__group { font-size: var(--ze-fs-2xs); font-weight: var(--ze-fw-semibold); text-transform: uppercase; color: var(--ze-color-text-muted); padding: 6px 16px; }
html:lang(ar) .c-nav__group { text-transform: none; }
.c-nav__cta { margin-inline-start: var(--ze-space-4); }
.c-nav__end { margin-inline-start: auto; display: flex; align-items: center; gap: var(--ze-space-2); }
.c-burger { inline-size: var(--ze-tap-min); block-size: var(--ze-tap-min); display: grid; place-items: center; background: transparent; border: 0; cursor: pointer; color: var(--ze-color-primary-700); }
.c-burger .u-icon { inline-size: 24px; block-size: 24px; }

@media (max-width: 899px) {
  .c-nav__list, .c-nav__cta { display: none; }
  .c-nav { block-size: 56px; }
  .c-nav__brand { padding-block: 16px; }
  .c-nav__logo { block-size: 24px; }
}
@media (min-width: 900px) {
  .c-burger { display: none; }
  .c-utility__abbr { display: none; }
}
@media (min-width: 1200px) {
  .c-nav__list { gap: 8px; }
  .c-nav__link { font-size: 15px; }
}
@media (max-width: 639px) {
  .c-utility { display: none; }
}

/* 抽屉 */
.c-overlay { position: fixed; inset: 0; background: rgba(11,36,24,.48); z-index: var(--ze-z-overlay); display: none; }
.c-overlay.is-open { display: block; }
.c-drawer {
  position: fixed; inset-block: 0; inset-inline-end: 0;
  inline-size: min(var(--ze-drawer-inline-size), 88vw); block-size: 100dvh;
  background: var(--ze-color-surface); box-shadow: var(--ze-shadow-3); z-index: var(--ze-z-drawer);
  transform: translateX(100%); transition: transform var(--ze-dur-base) var(--ze-ease);
  display: flex; flex-direction: column; overflow-y: auto;
}
.c-drawer.is-open { transform: translateX(0); }
.c-drawer__head { block-size: 56px; background: var(--ze-color-primary-900); color: var(--ze-color-text-invert); display: flex; align-items: center; justify-content: space-between; padding-inline: var(--ze-space-4); flex-shrink: 0; }
.c-drawer__close { inline-size: var(--ze-tap-min); block-size: var(--ze-tap-min); display: grid; place-items: center; background: transparent; border: 0; color: var(--ze-color-text-invert); cursor: pointer; }
.c-drawer__body { padding: var(--ze-space-4) var(--ze-page-padding-inline) 96px; flex: 1; }
.c-drawer__link { display: flex; align-items: center; justify-content: space-between; gap: var(--ze-space-2); min-block-size: 56px; font-size: 17px; font-weight: var(--ze-fw-semibold); color: var(--ze-color-text); border-block-end: 1px solid var(--ze-color-border-subtle); text-decoration: none; inline-size: 100%; background: transparent; border-inline: 0; border-block-start: 0; cursor: pointer; text-align: start; }
.c-drawer__link:hover { color: var(--ze-color-primary-700); text-decoration: none; }
.c-drawer__sub { padding-inline-start: var(--ze-space-4); display: none; }
.c-drawer__sub.is-open { display: block; }
.c-drawer__sub a { display: block; min-block-size: 48px; display: flex; align-items: center; font-size: 15px; font-weight: var(--ze-fw-regular); color: var(--ze-color-neutral-700); text-decoration: none; }
.c-drawer__foot { position: sticky; inset-block-end: 0; background: var(--ze-color-surface); border-block-start: 1px solid var(--ze-color-border); padding: var(--ze-space-4) var(--ze-page-padding-inline); display: grid; gap: var(--ze-space-3); }

/* ── 5.11 页脚 ────────────────────────────────────────────────────────── */
.l-footer { padding-block: var(--ze-space-16) var(--ze-space-8); border-block-start: 1px solid transparent; border-image: var(--ze-gradient-metal-h) 1; }
.c-footer__grid { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .c-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .c-footer__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.c-footer__title { font-size: var(--ze-fs-sm); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text-invert); letter-spacing: .02em; margin-block-end: var(--ze-space-3); }
.c-footer__list { display: grid; gap: var(--ze-space-1); }
/* 触控目标 ≥24px（WCAG 2.5.8）：用内边距撑高，同时收窄间距以保持原有视觉节奏 */
.c-footer__list a { display: inline-block; min-block-size: 24px; padding-block: 3px; font-size: var(--ze-fs-sm); color: var(--ze-color-text-invert-secondary); }
.c-footer__list a:hover { color: var(--ze-color-text-invert); text-decoration: underline; }
.c-footer__brand { font-size: 13px; color: var(--ze-color-text-invert-secondary); }
.c-footer__logo { block-size: 28px; color: var(--ze-color-text-invert); margin-block-end: var(--ze-space-3); }
.c-footer__trust { margin-block-start: var(--ze-space-8); padding-block-start: var(--ze-space-8); border-block-start: 1px solid var(--ze-color-border-dark); }
.c-footer__legal { margin-block-start: var(--ze-space-8); padding-block-start: var(--ze-space-6); border-block-start: 1px solid var(--ze-color-border-dark); font-size: 13px; color: var(--ze-color-text-invert-secondary); display: flex; flex-wrap: wrap; gap: var(--ze-space-2) var(--ze-space-4); align-items: center; }
.c-footer__legal a { display: inline-flex; align-items: center; min-block-size: 24px; color: var(--ze-color-text-invert-secondary); }
.c-footer__legal a:hover { color: var(--ze-color-text-invert); }

/* ── 5.12 面包屑 ──────────────────────────────────────────────────────── */
.c-crumbs { block-size: 48px; display: flex; align-items: center; background: var(--ze-color-surface-page); border-block-end: 1px solid var(--ze-color-border-subtle); padding-inline: var(--ze-page-padding-inline); font-size: 13px; color: var(--ze-color-text-secondary); }
.c-crumbs ol { display: flex; align-items: center; flex-wrap: wrap; gap: 0; }
.c-crumbs li { display: inline-flex; align-items: center; }
.c-crumbs a { color: var(--ze-color-text-secondary); }
.c-crumbs a:hover { color: var(--ze-color-primary-700); text-decoration: underline; }
.c-crumbs [aria-current="page"] { color: var(--ze-color-neutral-700); font-weight: var(--ze-fw-semibold); }
.c-crumbs__sep { margin-inline: var(--ze-space-2); color: var(--ze-color-border-strong); }
.c-crumbs__ellipsis { margin-inline: var(--ze-space-2); }
@media (max-width: 899px) { .c-crumbs__mid { display: none; } }

/* ── 5.14 FAQ 折叠 ────────────────────────────────────────────────────── */
.c-accordion { background: var(--ze-color-surface); }
.c-accordion__item { margin: 0; border-block-end: 1px solid var(--ze-color-border-subtle); }
.c-accordion__item:first-child { border-block-start: 1px solid var(--ze-color-border); }
.c-accordion__trigger {
  inline-size: 100%; min-block-size: 56px; padding: var(--ze-space-4) 0; text-align: start;
  font-size: var(--ze-fs-h5); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text);
  display: flex; justify-content: space-between; gap: var(--ze-space-4); align-items: center;
  background: transparent; border: 0; cursor: pointer;
}
.c-accordion__trigger:hover { background: var(--ze-color-surface-alt); }
.c-accordion__icon { inline-size: 24px; block-size: 24px; color: var(--ze-color-primary-700); flex-shrink: 0; transition: transform var(--ze-dur-fast) var(--ze-ease); }
.c-accordion__trigger[aria-expanded="true"] .c-accordion__icon { transform: rotate(45deg); }
.c-accordion__panel { padding: 0 0 var(--ze-space-5); }
.c-accordion__panel[hidden] { display: none; }
.c-accordion__a { font-size: var(--ze-fs-body); line-height: var(--ze-lh-body); color: var(--ze-color-neutral-700); max-inline-size: var(--ze-container-prose); }

/* ── 5.15 语言切换器 ──────────────────────────────────────────────────── */
.c-lang { position: relative; }
.c-lang__trigger { display: inline-flex; align-items: center; gap: 6px; min-block-size: 32px; padding-inline: 10px; background: transparent; border: 1px solid var(--ze-color-border-dark); border-radius: var(--ze-radius-pill); color: var(--ze-color-text-invert-secondary); font-size: var(--ze-fs-2xs); cursor: pointer; }
.c-lang__trigger:hover { color: var(--ze-color-text-invert); }
.c-lang__menu { position: absolute; inset-block-start: calc(100% + 6px); inset-inline-end: 0; min-inline-size: 200px; background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); box-shadow: var(--ze-shadow-3); border-radius: var(--ze-radius-sm); padding-block: 4px; max-block-size: 60vh; overflow-y: auto; display: none; z-index: 10; }
.c-lang.is-open .c-lang__menu { display: block; }
.c-lang__menu a { display: flex; align-items: center; justify-content: space-between; gap: var(--ze-space-3); min-block-size: 40px; padding-inline: var(--ze-space-3); font-size: var(--ze-fs-sm); color: var(--ze-color-text); }
.c-lang__menu a:hover { background: var(--ze-color-primary-50); text-decoration: none; }
.c-lang__menu a[aria-current="true"] { font-weight: var(--ze-fw-semibold); color: var(--ze-color-primary-700); }
.c-lang__menu .u-icon { inline-size: 14px; block-size: 14px; color: var(--ze-color-primary-700); }
.c-lang--grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--ze-space-2); }
.c-lang--grid a { display: grid; place-items: center; min-block-size: var(--ze-tap-min); padding: var(--ze-space-2); background: var(--ze-color-surface-page); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); font-size: 13px; color: var(--ze-color-text); text-align: center; }
.c-lang--grid a[aria-current="true"] { background: var(--ze-color-primary-50); border-color: var(--ze-color-primary-700); font-weight: var(--ze-fw-semibold); }

/* ── 5.16 悬浮通道 ────────────────────────────────────────────────────── */
.c-fab {
  position: fixed; inset-block-end: var(--ze-space-6); inset-inline-end: var(--ze-space-6);
  inline-size: var(--ze-fab-size); block-size: var(--ze-fab-size); border-radius: var(--ze-radius-full);
  background: var(--ze-color-primary-700); color: var(--ze-color-text-invert); display: grid; place-items: center;
  box-shadow: var(--ze-shadow-fab); z-index: var(--ze-z-fab); text-decoration: none;
}
.c-fab:hover { background: var(--ze-color-primary-800); transform: scale(1.06); color: var(--ze-color-text-invert); }
.c-fab:active { transform: scale(.98); }
.c-fab .u-icon { inline-size: 28px; block-size: 28px; }
@media (max-width: 899px) { .c-fab { display: none; } }

.c-stickybar {
  position: fixed; inset-block-end: 0; inset-inline: 0;
  block-size: var(--ze-stickybar-block-size); padding-block-end: env(safe-area-inset-bottom, 0px);
  background: var(--ze-color-surface); border-block-start: 1px solid var(--ze-color-border);
  box-shadow: 0 -2px 8px rgba(11,36,24,.08); z-index: var(--ze-z-fab);
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
}
.c-stickybar__item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-block-size: 56px; font-size: var(--ze-fs-2xs); color: var(--ze-color-neutral-700); text-decoration: none; }
.c-stickybar__item:hover { background: var(--ze-color-primary-50); text-decoration: none; }
.c-stickybar__item .u-icon { inline-size: 20px; block-size: 20px; color: var(--ze-color-primary-700); }
@media (min-width: 900px) { .c-stickybar { display: none; } }

/* ── 5.17 区块标题 ────────────────────────────────────────────────────── */
.c-secheader { max-inline-size: var(--ze-container-prose); }
.c-secheader__eyebrow { font-size: var(--ze-fs-eyebrow); font-weight: var(--ze-fw-semibold); text-transform: uppercase; letter-spacing: .08em; color: var(--ze-color-link); margin-block-end: var(--ze-space-2); }
html:lang(ar) .c-secheader__eyebrow { text-transform: none; letter-spacing: 0; }
.c-secheader__rule { inline-size: 48px; block-size: 2px; background: var(--ze-gradient-metal); margin-block: var(--ze-space-4); }
.c-secheader__sub { font-size: var(--ze-fs-lead); line-height: 1.7; color: var(--ze-color-text-secondary); }
.c-secheader--center { text-align: center; max-inline-size: none; }
.c-secheader--center .c-secheader__rule { margin-inline: auto; }
.c-secheader--center .c-secheader__sub { margin-inline: auto; max-inline-size: var(--ze-container-prose); }
.c-secheader--dark .c-secheader__eyebrow { color: var(--ze-color-primary-200); }
.c-secheader--dark h2 { color: var(--ze-color-text-invert); }
.c-secheader--dark .c-secheader__sub { color: var(--ze-color-text-invert-secondary); }
.c-secheader--dark .c-secheader__rule { background: var(--ze-color-primary-300); }
.c-section__head { margin-block-end: var(--ze-space-10); }

/* ── 5.18 数据指标卡 ──────────────────────────────────────────────────── */
.c-metric-grid { display: grid; gap: var(--ze-space-4); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 900px) { .c-metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.c-metric {
  min-block-size: 120px; padding: var(--ze-space-5); background: var(--ze-color-surface);
  border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm);
  border-block-start: 2px solid transparent; border-image: var(--ze-gradient-metal) 2;
  display: flex; flex-direction: column; gap: var(--ze-space-2); justify-content: center;
}
.c-metric__value { font-size: var(--ze-fs-metric); font-weight: var(--ze-fw-bold); color: var(--ze-color-text); font-variant-numeric: tabular-nums; line-height: var(--ze-lh-tight); }
.c-metric__label { font-size: var(--ze-fs-sm); color: var(--ze-color-text-secondary); line-height: var(--ze-lh-snug); }
.c-metric--dark { background: transparent; border: 1px solid var(--ze-color-border-dark); border-block-start: 2px solid transparent; border-image: var(--ze-gradient-metal) 2; }
.c-metric--dark .c-metric__value { color: var(--ze-color-text-invert); }
.c-metric--dark .c-metric__label { color: var(--ze-color-text-invert-secondary); }

/* ── 5.19 筛选器 ──────────────────────────────────────────────────────── */
.c-filter { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); padding: var(--ze-space-4); display: grid; gap: var(--ze-space-3); }
@media (min-width: 900px) { .c-filter { position: sticky; inset-block-start: calc(var(--ze-header-block-size) + 2px); z-index: 90; } }
.c-filter__row { display: flex; flex-wrap: wrap; gap: var(--ze-space-2); align-items: center; }
.c-filter__toggle { min-block-size: 40px; padding-inline: 14px; border: 1px solid var(--ze-color-border-strong); border-radius: var(--ze-radius-sm); background: var(--ze-color-surface); font-size: var(--ze-fs-sm); color: var(--ze-color-neutral-700); display: inline-flex; align-items: center; gap: var(--ze-space-2); cursor: pointer; }
.c-filter__toggle.is-active { background: var(--ze-color-primary-50); border-color: var(--ze-color-primary-700); color: var(--ze-color-primary-700); }
.c-filter__count { font-size: var(--ze-fs-sm); color: var(--ze-color-text-secondary); margin-inline-start: auto; }
.c-filter__panel { display: none; border-block-start: 1px solid var(--ze-color-border-subtle); padding-block-start: var(--ze-space-3); }
.c-filter__panel.is-open { display: block; }
.c-filter__group { display: flex; flex-wrap: wrap; gap: var(--ze-space-2); }
.c-filter__label { font-size: var(--ze-fs-2xs); font-weight: var(--ze-fw-semibold); color: var(--ze-color-text-muted); text-transform: uppercase; }
html:lang(ar) .c-filter__label { text-transform: none; }

/* ── 5.21 补充组件 ────────────────────────────────────────────────────── */
.c-compare { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-xs); overflow: hidden; }
.c-compare th, .c-compare td { padding: 12px 16px; border-block-end: 1px solid var(--ze-color-border-subtle); text-align: start; }
.c-compare thead th { background: var(--ze-color-primary-800); color: var(--ze-color-text-invert); font-size: 13px; font-weight: var(--ze-fw-semibold); }
.c-compare__missing { font-size: 13px; color: var(--ze-color-text-disabled); }
.c-compare__diff { background: var(--ze-color-primary-50); }

.c-empty { padding-block: var(--ze-space-16); text-align: center; display: grid; gap: var(--ze-space-3); justify-items: center; }
.c-empty .u-icon { inline-size: 48px; block-size: 48px; color: var(--ze-color-border-strong); }
.c-empty__title { font-size: var(--ze-fs-h4); font-weight: var(--ze-fw-semibold); color: var(--ze-color-neutral-700); }
.c-empty__body { font-size: var(--ze-fs-sm); color: var(--ze-color-text-secondary); }
.c-empty__actions { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); margin-block-start: var(--ze-space-4); justify-content: center; }

.c-timeline { display: grid; gap: var(--ze-space-6); position: relative; padding-inline-start: var(--ze-space-8); }
.c-timeline::before { content: ''; position: absolute; inset-inline-start: 8px; inset-block: 0; inline-size: 2px; background: var(--ze-color-border); }
.c-timeline__item { position: relative; }
.c-timeline__dot { position: absolute; inset-inline-start: calc(-1 * var(--ze-space-8)); inset-block-start: 6px; inline-size: 16px; block-size: 16px; border-radius: var(--ze-radius-full); background: var(--ze-color-primary-700); border: 3px solid var(--ze-color-surface); }
.c-timeline__year { font-family: var(--ze-font-mono); font-size: 15px; font-weight: var(--ze-fw-semibold); color: var(--ze-color-primary-700); }


/* ==========================================================================
   pages.css — .p-* 页面专属覆盖（禁止在 .c-* 上直接写页面专属样式）
   ========================================================================== */

/* ── 首页 ─────────────────────────────────────────────────────────────── */
/* 深色满幅 Hero：客户拍板 surface-dark 满幅 + 白字 + 720px（design-spec §7.1 深色版本） */
.p-home__hero { position: relative; background: var(--ze-color-surface-dark); color: var(--ze-color-text-invert); display: flex; align-items: center; }
@media (min-width: 640px) { .p-home__hero { min-block-size: 560px; } }
@media (min-width: 900px) { .p-home__hero { min-block-size: 720px; } }
.p-home__hero-inner { padding-block: var(--ze-section-y); display: grid; gap: var(--ze-space-8); inline-size: 100%; }
.p-home__hero-copy { display: grid; gap: var(--ze-space-5); max-inline-size: var(--ze-container-prose); }
.p-home__hero h1 { color: var(--ze-color-text-invert); }
.p-home__hero-sub { font-size: var(--ze-fs-lead); line-height: 1.7; color: var(--ze-color-text-invert-secondary); }
.p-home__hero-actions { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); }
.p-home__trust { border-block-start: 1px solid var(--ze-color-border-dark); padding-block-start: var(--ze-space-8); display: grid; gap: var(--ze-space-6); }
.p-home__trust-label { font-size: var(--ze-fs-sm); color: var(--ze-color-text-invert-secondary); }
.p-home__capability { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .p-home__capability { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.p-home__capitem { display: grid; gap: var(--ze-space-3); }
.p-home__capitem .u-icon { inline-size: 24px; block-size: 24px; color: var(--ze-color-primary-700); }
.p-home__apps { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); }
.p-home__apps a { display: inline-flex; align-items: center; gap: var(--ze-space-2); min-block-size: var(--ze-tap-min); font-size: var(--ze-fs-sm); color: var(--ze-color-link); }
.p-home__apps a:hover { color: var(--ze-color-link-hover); text-decoration: underline; }

/* ── 产品总览 ─────────────────────────────────────────────────────────── */
.p-products__intro { padding-block: var(--ze-section-y-tight); }
.p-products__chem { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-products__chem { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 900px) {
  .p-products__chem > * + * { border-inline-start: 1px solid var(--ze-color-border); padding-inline-start: var(--ze-space-8); }
}
.p-products__chemcol { display: grid; gap: var(--ze-space-3); align-content: start; }
.p-products__gradegrid { display: grid; gap: var(--ze-grid-gutter); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .p-products__gradegrid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .p-products__gradegrid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1200px) { .p-products__gradegrid--series { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

/* ── 系列页 ───────────────────────────────────────────────────────────── */
.p-series__hero { background: var(--ze-gradient-plate); color: var(--ze-color-text-invert); padding-block: var(--ze-space-16); }
@media (max-width: 899px) { .p-series__hero { padding-block: var(--ze-space-10); } }
.p-series__hero h1 { color: var(--ze-color-text-invert); }
.p-series__facts { font-family: var(--ze-font-mono); font-size: 15px; color: var(--ze-color-text-invert-secondary); }
.p-series__chips { display: flex; flex-wrap: wrap; gap: var(--ze-space-2); }

/* ── 牌号详情 ─────────────────────────────────────────────────────────── */
.p-grade__intro { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); align-items: start; }
@media (min-width: 900px) { .p-grade__intro { grid-template-columns: repeat(12, minmax(0, 1fr)); } .p-grade__intro-media { grid-column: span 5; } .p-grade__intro-copy { grid-column: span 7; } }
.p-grade__facts { display: flex; flex-wrap: wrap; gap: var(--ze-space-2) var(--ze-space-4); font-family: var(--ze-font-mono); font-size: 13px; color: var(--ze-color-text-secondary); }
.p-grade__lead { font-size: var(--ze-fs-lead); line-height: 1.7; color: var(--ze-color-text-secondary); max-inline-size: var(--ze-container-prose); }
.p-grade__applist { display: grid; gap: var(--ze-space-3); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-grade__applist { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.p-grade__appitem { display: flex; gap: var(--ze-space-3); align-items: flex-start; font-size: 15px; }
.p-grade__appitem .u-icon { inline-size: 20px; block-size: 20px; color: var(--ze-color-primary-700); flex-shrink: 0; margin-block-start: 4px; }
.p-grade__pack { display: grid; gap: var(--ze-space-6); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-grade__pack { grid-template-columns: repeat(12, minmax(0, 1fr)); } .p-grade__pack-media { grid-column: span 4; } .p-grade__pack-copy { grid-column: span 8; } }
.p-grade__files { display: grid; gap: var(--ze-space-3); }
.p-grade__cta { background: var(--ze-color-surface-dark); color: var(--ze-color-text-invert); padding-block: var(--ze-section-y-tight); }
.p-grade__cta-actions { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); }

/* ── 应用行业页 ───────────────────────────────────────────────────────── */
.p-app__hero { background: var(--ze-gradient-plate); color: var(--ze-color-text-invert); padding-block: var(--ze-space-12); position: relative; overflow: hidden; }
.p-app__hero h1 { color: var(--ze-color-text-invert); position: relative; z-index: 1; }
.p-app__hero-sub { font-size: var(--ze-fs-lead); line-height: 1.7; color: var(--ze-color-text-invert-secondary); max-inline-size: var(--ze-container-prose); position: relative; z-index: 1; }
.p-app__hero-media { position: absolute; inset: 0; z-index: 0; }
.p-app__hero-media .u-ph { block-size: 100%; border-radius: 0; }
.p-app__pain { display: grid; gap: var(--ze-space-6); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-app__pain { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.p-app__painitem { display: grid; gap: var(--ze-space-3); border-inline-start: 2px solid var(--ze-color-border-strong); padding-inline-start: var(--ze-space-4); }
.p-app__painitem .u-icon { inline-size: 24px; block-size: 24px; color: var(--ze-color-primary-700); }
.p-app__why { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-app__why { grid-template-columns: repeat(12, minmax(0, 1fr)); } .p-app__why-head { grid-column: span 4; } .p-app__why-list { grid-column: span 8; } }
.p-app__whylist { display: grid; gap: var(--ze-space-4); }
.p-app__whyitem { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--ze-space-3); font-size: var(--ze-fs-body); line-height: var(--ze-lh-body); }
.p-app__whynum { font-family: var(--ze-font-mono); font-weight: var(--ze-fw-semibold); color: var(--ze-color-primary-700); }

/* ── 关于 ─────────────────────────────────────────────────────────────── */
.p-about__split { display: grid; gap: var(--ze-space-8); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-about__split { grid-template-columns: repeat(12, minmax(0, 1fr)); } .p-about__split-head { grid-column: span 4; } .p-about__split-body { grid-column: span 8; } }
.p-about__locations { display: grid; gap: var(--ze-space-6); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .p-about__locations { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.p-about__subcards { display: grid; gap: var(--ze-space-6); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .p-about__subcards { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

/* ── 表单页 ───────────────────────────────────────────────────────────── */
.p-form__intro { padding-block: var(--ze-section-y-tight); }
.p-form__layout { display: grid; gap: var(--ze-space-10); grid-template-columns: minmax(0, 1fr); align-items: start; }
@media (min-width: 1200px) { .p-form__layout { grid-template-columns: repeat(12, minmax(0, 1fr)); } .p-form__main { grid-column: span 8; } .p-form__aside { grid-column: span 4; } }
.p-form__aside { display: grid; gap: var(--ze-space-4); }
.p-form__card { background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); padding: var(--ze-space-5); display: grid; gap: var(--ze-space-3); }
.p-form__card-title { font-size: var(--ze-fs-h5); font-weight: var(--ze-fw-semibold); }
.p-form__card-list { display: grid; gap: var(--ze-space-2); font-size: var(--ze-fs-sm); }
.p-form__card-list a, .p-form__card-list span { display: inline-flex; align-items: center; gap: var(--ze-space-2); color: var(--ze-color-text-secondary); }
.p-form__card-list .u-icon { inline-size: 16px; block-size: 16px; color: var(--ze-color-primary-700); }
.p-form__prefill { background: var(--ze-color-primary-50); border: 1px solid var(--ze-color-primary-100); border-radius: var(--ze-radius-sm); padding: var(--ze-space-4); display: flex; flex-wrap: wrap; gap: var(--ze-space-3); align-items: center; margin-block-end: var(--ze-space-6); }
.p-form__privacy { font-size: 13px; color: var(--ze-color-text-secondary); }
.p-form__channels { display: grid; gap: var(--ze-space-4); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .p-form__channels { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

/* ── 下载中心 ─────────────────────────────────────────────────────────── */
.p-downloads__list { display: grid; gap: var(--ze-space-3); }
.p-downloads__tabs { display: flex; flex-wrap: wrap; gap: var(--ze-space-2); margin-block-end: var(--ze-space-6); }
.p-downloads__groups { display: block; }
.p-downloads__group { margin-block-end: var(--ze-space-10); scroll-margin-top: var(--ze-space-6); }
.p-downloads__group:last-child { margin-block-end: 0; }
.p-downloads__group-title { font-size: var(--ze-fs-h3); line-height: 1.3; margin-block-end: var(--ze-space-4); color: var(--ze-color-heading); }

/* ── FAQ ─────────────────────────────────────────────────────────────── */
.p-faq__tabs { display: flex; flex-wrap: wrap; gap: var(--ze-space-2); margin-block-end: var(--ze-space-6); }
.p-faq__group { margin-block-end: var(--ze-space-10); }

/* ── 成功页 ───────────────────────────────────────────────────────────── */
.p-ty__ref { font-family: var(--ze-font-mono); font-size: var(--ze-fs-h4); font-weight: var(--ze-fw-bold); color: var(--ze-color-primary-700); user-select: all; }
.p-ty__steps { display: grid; gap: var(--ze-space-4); counter-reset: step; }
.p-ty__step { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--ze-space-3); align-items: start; }
.p-ty__step::before { counter-increment: step; content: counter(step); font-family: var(--ze-font-mono); font-weight: var(--ze-fw-semibold); color: var(--ze-color-primary-700); }

/* ── 法务 ─────────────────────────────────────────────────────────────── */
.p-legal__body { display: grid; gap: var(--ze-space-8); max-inline-size: var(--ze-container-prose); }
.p-legal__block h2 { font-size: var(--ze-fs-h3); margin-block-end: var(--ze-space-3); }

/* ── 根语言跳转页 ─────────────────────────────────────────────────────── */
.p-root { min-block-size: 100dvh; display: grid; place-items: center; background: var(--ze-color-surface-page); padding: var(--ze-space-8) var(--ze-page-padding-inline); }
.p-root__inner { inline-size: 100%; max-inline-size: 720px; background: var(--ze-color-surface); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); padding: var(--ze-space-10) var(--ze-space-8); display: grid; gap: var(--ze-space-6); }
.p-root__list { display: grid; gap: var(--ze-space-3); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 640px) { .p-root__list { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.p-root__list a { display: flex; align-items: center; justify-content: space-between; gap: var(--ze-space-2); min-block-size: var(--ze-tap-min); padding-inline: var(--ze-space-4); border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); font-size: var(--ze-fs-sm); color: var(--ze-color-text); }
.p-root__list a:hover { border-color: var(--ze-color-primary-700); background: var(--ze-color-primary-50); text-decoration: none; }

/* ── 404 ─────────────────────────────────────────────────────────────── */
.p-404 { padding-block: var(--ze-space-24); text-align: center; display: grid; gap: var(--ze-space-6); justify-items: center; }
.p-404__actions { display: flex; flex-wrap: wrap; gap: var(--ze-space-3); justify-content: center; }

/* 阻燃机理示意图 —— content-plan §10 授权从零构建的 SVG 示意图 */
.p-app__mech { margin-block-start: var(--ze-space-10); }
.p-app__mech-media { border: 1px solid var(--ze-color-border); border-radius: var(--ze-radius-sm); background: var(--ze-color-surface); padding: var(--ze-space-5); }
.p-app__mech-media svg { display: block; inline-size: 100%; block-size: auto; color: var(--ze-color-text); }
.p-app__mech-eq { font-family: var(--ze-font-mono); font-size: var(--ze-fs-sm); color: var(--ze-color-text); margin-block-start: var(--ze-space-4); padding-block-start: var(--ze-space-4); border-block-start: 1px solid var(--ze-color-border-subtle); }
.p-app__mech-cap { font-size: var(--ze-fs-sm); line-height: 1.6; color: var(--ze-color-text-secondary); margin-block-start: var(--ze-space-3); max-inline-size: 72ch; }


/* ==========================================================================
   rtl.css — 仅图标翻转与「无法用逻辑属性表达」的物理方向例外
   设计约束：本文件超过 20 行说明有逻辑属性没写对，回去改组件。
   驱动方式：全部由 [dir="rtl"] 驱动，禁止用语言码白名单硬编码。
   ========================================================================== */

/* 例外 1：方向性图标水平翻转（chevron / 箭头 / 返回键）
   理由：scaleX() 是物理变换，逻辑属性表达不了；design-spec §8.1 第 8 条要求翻转。 */
[dir="rtl"] .u-icon--flip { transform: scaleX(-1); }

/* 例外 2：移动端抽屉从右侧滑入改为左侧滑入
   理由：translateX() 无法用逻辑属性表达；design-spec §5.10 / §8.1 第 6 条。 */
[dir="rtl"] .c-drawer { transform: translateX(-100%); }
[dir="rtl"] .c-drawer.is-open { transform: translateX(0); }

/* 例外 3：面包屑分隔符方向翻转
   理由：字符型分隔符本身没有逻辑形态，design-spec §5.12 / §8.1 第 7 条。 */
[dir="rtl"] .c-crumbs__sep { transform: scaleX(-1); display: inline-block; }

/* 例外 4：640–899px 首列 sticky 的滚动阴影换边
   理由：box-shadow 的水平偏移是物理值，design-spec §6.4 要求该档首列 sticky。 */
[dir="rtl"] .c-spec th[scope="row"] { box-shadow: -1px 0 0 var(--ze-color-border); }

/* 以下不是例外，是 bidi 安全兜底：任何数值/代码容器即便遗漏 dir 也不参与重排 */
[dir="rtl"] bdi, [dir="rtl"] [dir="ltr"] { unicode-bidi: isolate; }