/* ========================================
   common.css —— 全局 Design Tokens + 公共样式（统一字号/颜色/间距/响应式）
   ======================================== */

/* ============ A 级核心：全局 Design Tokens（全站真相来源，解决「颜色两套命名/字号 30+ 种」问题）============ */
:root {
  /* ===== 颜色系统：双命名兼容（Alias 旧代码不破坏）===== */
  --green: #00e676;
  --green-primary: #00e676;             /* Alias: 旧代码用 --green-primary */
  --green-dark: #00c853;
  --green-dim: rgba(0,230,118,0.1);      /* 浅底 */
  --green-bg:  rgba(0,230,118,0.04);     /* 极浅底 */
  --green-border: rgba(0,230,118,0.12);  /* 标准边框 */
  --border-green: rgba(0,230,118,0.12);  /* Alias: 旧代码用 --border-green */
  --border-green-hover: rgba(0,230,118,0.25); /* Alias: 旧代码用 */

  --text: #e8f5e9;
  --text-primary: #e8f5e9;               /* Alias: 旧代码用 */
  --text-sec: #a5d6a7;
  --soft: #a5d6a7;                       /* Alias: 旧二级页 calculator/data 用 --soft */
  --text-dim: #81c784;
  --muted: #81c784;                      /* Alias: 旧二级页用 --muted */
  --text-muted: #5a8a5a;
  --bg: #050805;
  --bg-card: rgba(12,24,12,0.6);
  --bg-card-deep: rgba(0,0,0,0.28);      /* 统一卡片深底 (替代原 0.2/0.22/0.25/0.3/0.32/0.35 混乱) */

  --orange: #ff9800;
  --warn: #ffab40;                       /* Alias: 旧页用 --warn */
  --orange-dim: rgba(255,152,0,0.08);
  --blue: #29b6f6;
  --blue-dim: rgba(41,182,246,0.08);
  --red: #ff5252;
  --danger: #ff5252;                     /* Alias */
  --purple: #ab47bc;

  /* ===== 圆角系统 ===== */
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --radius-tiny: 6px;

  /* ===== 字号系统：12 档统一（替代原来 30+ 散值）===== */
  --fs-tag:     10.5px;   /* tag/cat/徽标 */
  --fs-cap-sm:  11px;     /* 小标签/说明小字 */
  --fs-caption: 11.5px;   /* cmd-upd 等中号说明 */
  --fs-cap-lg:  12px;     /* 普通说明/链接/meta */
  --fs-body-sm: 13px;     /* 正文小字（rec-desc/news-summary 旧值 13）*/
  --fs-body:    14px;     /* 正文标准（导航链接/输入）*/
  --fs-body-lg: 15px;     /* 正文大字（hero p 旧值 15）*/
  --fs-h5:      13px;     /* 卡片小标题（eco-mini-name/do-name 旧值 13）*/
  --fs-h4:      14px;     /* 4级标题（dc-name 旧值 14）*/
  --fs-h3:      16px;     /* 3级标题（tool-matrix-title / section-title 旧值 16）*/
  --fs-h2:      18px;     /* 2级标题（面板/section 标题）*/
  --fs-h1:      22px;     /* 1级（手机端 hero）*/
  --fs-h1-lg:   28px;     /* 1级（平板 hero）*/
  --fs-h1-xl:   34px;     /* 1级（桌面 hero）*/

  /* ===== 间距 / 留白系统：6 档统一（替代原 8/10/12/14/16/18/20/22/24/28/32/36/40 混乱）===== */
  --sp-2xs:  4px;
  --sp-xs:   8px;
  --sp-sm:  12px;
  --sp-md:  16px;
  --sp-lg:  20px;
  --sp-xl:  28px;
  --sp-2xl: 36px;

  /* ===== 内边距：卡片 4 档统一 ===== */
  --pad-card-xs: 12px 12px;     /* 小卡/手机 */
  --pad-card-sm: 14px 14px 12px;/* 卡片（tool-matrix-card 原值）*/
  --pad-card-md: 16px;          /* 标准卡（safety-card/sig-card）原值 */
  --pad-card-lg: 20px;          /* 大卡（panel/tool-matrix/contract-panel）原值 */
  --pad-section: 20px 22px;     /* 指挥中心级大卡 */

  /* ===== 响应式 5 档标准（统一原来 12 档断点，彻底消灭 900px 导航消失黑洞）=====
     Desktop:   > 1100px (原 1260/1100 合并 → 1100 为最大断点卡)
     Laptop:   ≤ 1100px （原 1260 合并到此档）
     Tablet:   ≤ 768px  （导航切移动 / 网格大改）← 统一原 768/900/960 → 768 一刀切
     Phone:    ≤ 480px  （网格单列 / 大字号缩小）← 统一原 420/480/560/600 → 480 一刀切
     Mini:     ≤ 360px  （极小屏最后防线）
  */
}

/* ============ B 级：全站 body/容器基础规范 ============ */
html, body { overflow-x: hidden; }

/* iOS 手机端 input 16px 防放大 + WCAG 最小 44x44 可点区（统一所有页，不再各页各写一遍）*/
@media (max-width: 768px) {
  input[type="search"], input[type="text"], input[type="number"],
  input[id$="-search"], input[id$="-address"], textarea, select {
    font-size: 16px !important;
    min-height: 44px !important;
  }
  button, .btn, .chip, .cmd-act, .ai-tag, .dc-btn, .contract-tag,
  .social-item, .footer-col a, .do-item, .rec-card,
  .tool-matrix-card, .path-step, .news-dot {
    min-height: 44px !important;
  }
}

/* ========================================
   首页同款语言栏皮肤（高特异性，保证覆盖二级页内联写的 .lang-dropdown/.lang-menu）
   来源：index.html 内联 .lang-* 7 条规则，完全 1:1 移植
   ======================================== */
body .lang-dropdown { position: relative; }
body .lang-dropdown .lang-menu {
  position: absolute; top: calc(100% + 6px); right: 0; min-width: 160px;
  background: rgba(6,16,6,0.96); border: 1px solid rgba(0,230,118,0.25); border-radius: 12px;
  padding: 6px; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  z-index: 9999;
  box-shadow: 0 12px 32px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,230,118,0.08);
  visibility: hidden; opacity: 0; transform: translateY(-6px) scale(0.98);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
}
body .lang-dropdown.open .lang-menu,
body .lang-dropdown .lang-menu.is-open {
  visibility: visible; opacity: 1; transform: translateY(0) scale(1); pointer-events: auto;
}
body .lang-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 10px;
  border: 1px solid rgba(0,230,118,0.25); background: transparent;
  color: #e8f5e9; font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all .2s ease; font-family: inherit;
  line-height: 1;
}
body .lang-toggle:hover { border-color: #00e676; color: #00e676; }
body .lang-toggle .lang-flag { font-size: 14px; }
body .lang-toggle .lang-name { font-size: 13px; }
body .lang-toggle .lang-arrow {
  display: inline-block; transition: transform 0.2s ease; font-size: 10px;
}
body .lang-toggle[aria-expanded="true"] .lang-arrow { transform: rotate(180deg); }
body .lang-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 12px; border-radius: 10px; font-size: 13px;
  color: #e8f5e9; background: transparent; border: none; cursor: pointer;
  text-align: left; transition: background 0.2s ease, color 0.2s ease; font-family: inherit;
}
body .lang-item:hover,
body .lang-item.active { background: rgba(0,230,118,0.1); color: #00e676; }

/* ========================================
   通用导航基础布局：恢复桌面版导航，并保留手机版菜单切换
   ======================================== */
body .nav,
body .navbar {
  position: sticky !important;
  top: 0 !important;
  z-index: 100 !important;
  background: rgba(5, 8, 5, 0.92) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  border-bottom: 1px solid rgba(0,230,118,0.12) !important;
}

body .nav-inner,
body .nav-container,
body .navbar .nav-container {
  max-width: 1400px !important;
  margin: 0 auto !important;
  height: 64px !important;
  padding: 0 24px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 12px !important;
  position: relative !important;
}

body .nav-brand,
body .nav-left,
body .navbar .nav-left {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  text-decoration: none !important;
  color: inherit !important;
  flex-shrink: 0 !important;
}

body .nav-brand-badge,
body .logo-icon {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  flex-shrink: 0 !important;
}

body .nav-logo,
body .logo-icon img {
  width: 40px !important;
  height: 40px !important;
  object-fit: contain !important;
  display: block !important;
  border-radius: 10px !important;
}

body .nav-brand-text,
body .logo-text {
  display: flex !important;
  flex-direction: column !important;
  line-height: 1.1 !important;
}

body .nav-brand-main,
body .logo-title {
  font-size: 16px !important;
  font-weight: 700 !important;
  color: var(--text) !important;
}

body .nav-brand-tag,
body .logo-sub {
  font-size: 11px !important;
  color: var(--text-muted) !important;
  margin-top: 2px !important;
}

body .nav-links,
body .navbar .nav-links,
body .nav-container .nav-links {
  display: flex !important;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  visibility: visible !important;
  opacity: 1 !important;
}

body .nav-links a,
body .nav-link,
body .navbar .nav-link,
body .nav-container .nav-link {
  color: var(--text-sec);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  position: relative;
}

body .nav-links a:hover,
body .nav-links a.active,
body .nav-links a[aria-current="page"],
body .nav-link:hover,
body .nav-link.active,
body .nav-link[aria-current="page"] {
  color: #00e676;
  background: rgba(0,230,118,0.06);
}

body .nav-actions,
body .nav-right,
body .navbar .nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

body .btn-ghost,
body .navbar .btn-ghost,
body .nav-right .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 10px;
  border: 1px solid rgba(0,230,118,0.25);
  background: transparent;
  color: #e8f5e9;
  font-size: 13px;
  font-weight: 500;
}

body .btn-primary,
body .btn-green,
body .btn-login,
body .btn-register,
body .navbar .btn-primary,
body .nav-right .btn-primary {
  background: linear-gradient(135deg, #00e676, #00c853);
  color: #000;
  border: none;
  border-radius: 10px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

body .lang-dropdown,
body .navbar .lang-dropdown {
  position: relative;
}

body .lang-dropdown .lang-menu,
body .navbar .lang-dropdown .lang-menu,
body .nav-right .lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 160px;
  background: rgba(6,16,6,0.96);
  border: 1px solid rgba(0,230,118,0.25);
  border-radius: 12px;
  padding: 6px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 9999;
  box-shadow: 0 12px 32px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,230,118,0.08);
  visibility: hidden;
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
}

body .lang-dropdown.open .lang-menu,
body .lang-dropdown .lang-menu.is-open,
body .navbar .lang-dropdown.open .lang-menu,
body .navbar .lang-dropdown .lang-menu.is-open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

body .lang-toggle,
body .navbar .lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 10px;
  border: 1px solid rgba(0,230,118,0.25);
  background: transparent;
  color: #e8f5e9;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

body .lang-item,
body .navbar .lang-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #e8f5e9;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

body .lang-item:hover,
body .lang-item.active,
body .navbar .lang-item:hover,
body .navbar .lang-item.active {
  background: rgba(0,230,118,0.1);
  color: #00e676;
}

body .nav-brand,
body .nav-left,
body .navbar .nav-left,
body .nav-right,
body .nav-actions {
  min-width: 0;
}

body .nav-toggle,
body #mobileMenuBtn {
  display: none !important;
  width: 40px !important;
  height: 40px !important;
  align-items: center !important;
  justify-content: center !important;
  border-radius: 10px !important;
  border: 1px solid rgba(0,230,118,0.18) !important;
  background: rgba(255,255,255,0.02) !important;
  color: var(--text) !important;
  font-size: 22px !important;
  cursor: pointer !important;
  flex-shrink: 0 !important;
}

body .nav-brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
}

body .nav-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  border-radius: 10px;
}

body .nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

body .nav-brand-main {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

body .nav-brand-tag {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

body .nav-links {
  display: flex !important;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  visibility: visible !important;
  opacity: 1 !important;
}

body .nav-links a {
  color: var(--text-sec);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 8px;
  transition: all 0.2s ease;
  position: relative;
}

body .nav-links a:hover,
body .nav-links a.active,
body .nav-links a[aria-current="page"] {
  color: #00e676;
  background: rgba(0,230,118,0.06);
}

body .nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

@media (min-width: 901px) {
  body .nav-links {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  body .nav-toggle,
  body #mobileMenuBtn {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }
}

@media (max-width: 900px) {
  body .nav-inner,
  body .nav-container,
  body .navbar {
    position: relative;
    gap: 8px;
  }

  body .nav-inner,
  body .nav-container {
    height: 64px;
    padding: 0 12px;
  }

  body .nav-toggle,
  body #mobileMenuBtn {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    width: 40px !important;
    height: 40px !important;
    align-items: center !important;
    justify-content: center !important;
    border-radius: 10px !important;
    background: rgba(255,255,255,0.02) !important;
    border: 1px solid rgba(0, 230, 118, 0.18) !important;
    color: var(--text) !important;
    font-size: 22px !important;
    line-height: 1 !important;
    cursor: pointer !important;
    flex-shrink: 0 !important;
  }

  body .nav-links,
  body #mobileNavMenu {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    position: absolute !important;
    left: 12px !important;
    right: 12px !important;
    top: calc(100% + 8px) !important;
    background: rgba(5, 8, 5, 0.98) !important;
    border: 1px solid rgba(0, 230, 118, 0.18) !important;
    border-radius: 14px !important;
    box-shadow: 0 18px 36px rgba(0,0,0,0.35) !important;
    padding: 10px 14px 12px !important;
    flex-direction: column !important;
    gap: 0 !important;
    z-index: 250 !important;
    overflow: hidden !important;
  }

  body #nav-menu-toggle:checked ~ .nav-links,
  body #nav-menu-toggle:checked + .nav-toggle + .nav-links,
  body #nav-menu-toggle:checked + label.nav-toggle + .nav-links,
  body .nav-links.show,
  body .nav-links.open,
  body #mobileNavMenu.show,
  body #mobileNavMenu.open {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  body .nav-links a,
  body #mobileNavMenu a {
    display: block !important;
    padding: 12px 6px !important;
    border-bottom: 1px solid rgba(0, 230, 118, 0.08) !important;
    color: var(--text) !important;
    font-size: 15px !important;
    line-height: 1.45 !important;
    border-radius: 8px !important;
  }

  body .nav-links a:last-child,
  body #mobileNavMenu a:last-child {
    border-bottom: none !important;
  }

  body .nav-actions .lang-dropdown,
  body .nav-right .lang-dropdown,
  body .nav-actions .lang-toggle,
  body .nav-right .lang-toggle {
    display: none !important;
  }

  body #mobileNavMenu .mobile-lang-switch {
    display: block !important;
    width: 100% !important;
    margin-top: 14px !important;
    padding: 14px 6px 4px !important;
    border-top: 1px solid rgba(0,230,118,0.14) !important;
  }

  body #mobileNavMenu .mobile-lang-label {
    display: block !important;
    margin-bottom: 9px !important;
    color: rgba(232,245,233,0.62) !important;
    font-size: 11px !important;
    font-weight: 700 !important;
    letter-spacing: .08em !important;
    text-transform: uppercase !important;
  }

  body #mobileNavMenu .mobile-lang-options {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 8px !important;
  }

  body #mobileNavMenu .mobile-lang-option {
    min-height: 46px !important;
    padding: 9px 10px !important;
    border: 1px solid rgba(0,230,118,0.12) !important;
    border-radius: 9px !important;
    background: rgba(0,0,0,.2) !important;
    color: #b9cbbf !important;
    font: inherit !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    text-align: center !important;
    cursor: pointer !important;
  }

  body #mobileNavMenu .mobile-lang-option:hover,
  body #mobileNavMenu .mobile-lang-option:focus-visible,
  body #mobileNavMenu .mobile-lang-option.active {
    border-color: rgba(0,230,118,.72) !important;
    background: rgba(0,230,118,.08) !important;
    color: #00e676 !important;
    outline: none !important;
  }

  body .nav-brand-tag {
    display: none;
  }

  body #nav-menu-toggle:not(:checked) ~ .nav-links,
  body #nav-menu-toggle:not(:checked) + .nav-toggle + .nav-links {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }

  body #nav-menu-toggle:checked ~ .nav-links,
  body #nav-menu-toggle:checked + .nav-toggle,
  body #nav-menu-toggle:checked + label.nav-toggle + .nav-links {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }
}

/* ========================================
   主导航当前栏目：统一为首页同款“绿色文字 + 短下划线”
   同时支持静态 active/aria-current 与 common.js 自动识别的 site-nav-current。
   高特异性用于覆盖各二级页面内联的整块绿色背景选中态。
   ======================================== */
body .nav-links a.active,
body .nav-links a.site-nav-current,
body .nav-links a[aria-current="page"],
body #mobileNavMenu a.active,
body #mobileNavMenu a.site-nav-current,
body #mobileNavMenu a[aria-current="page"] {
  position: relative;
  color: #00e676 !important;
  background: transparent !important;
}

/* ===== 手機菜單統一：兼容 homepage 和 legacy 二級頁的不同命名 ===== */
body .nav-menu-toggle,
body #nav-menu-toggle {
  position: absolute !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

body .nav-toggle,
body #mobileMenuBtn {
  display: none !important;
  align-items: center !important;
  justify-content: center !important;
  width: 40px !important;
  height: 40px !important;
  border-radius: 10px !important;
  border: 1px solid rgba(0, 230, 118, 0.18) !important;
  background: rgba(255, 255, 255, 0.02) !important;
  color: var(--text) !important;
  font-size: 22px !important;
  line-height: 1 !important;
  cursor: pointer !important;
  flex-shrink: 0 !important;
}

@media (max-width: 900px) {
  body .nav-toggle,
  body #mobileMenuBtn {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  body .nav-links,
  body #mobileNavMenu {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }

  body .nav-links.show,
  body .nav-links.open,
  body #mobileNavMenu.show,
  body #mobileNavMenu.open,
  body #nav-menu-toggle:checked ~ .nav-links,
  body #nav-menu-toggle:checked + .nav-toggle + .nav-links,
  body #nav-menu-toggle:checked + label.nav-toggle + .nav-links {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  body #nav-menu-toggle:checked + .nav-toggle,
  body #nav-menu-toggle:checked + label.nav-toggle,
  body #mobileMenuBtn.is-open,
  body #nav-menu-toggle:checked + #mobileMenuBtn {
    color: #00e676 !important;
    border-color: rgba(0, 230, 118, 0.4) !important;
    background: rgba(0, 230, 118, 0.06) !important;
    box-shadow: 0 0 0 1px rgba(0, 230, 118, 0.12) !important;
  }

  body #mobileMenuBtn.is-open span,
  body #nav-menu-toggle:checked + #mobileMenuBtn span,
  body #nav-menu-toggle:checked + label.nav-toggle span {
    color: #00e676 !important;
  }
}

/* Skip layout/paint work for sections well below the viewport. Browsers that
   support content-visibility render them only as the user approaches. */
@supports (content-visibility: auto) {
  main > section,
  main > .video-section,
  main > .course-section,
  main > .path-section,
  main > .faq-section,
  main > .tool-section,
  .footer {
    content-visibility: auto;
    contain-intrinsic-size: auto 520px;
  }
}

body .nav-links a.active::after,
body .nav-links a.site-nav-current::after,
body .nav-links a[aria-current="page"]::after,
body #mobileNavMenu a.active::after,
body #mobileNavMenu a.site-nav-current::after,
body #mobileNavMenu a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: #00e676;
  box-shadow: 0 0 8px rgba(0,230,118,0.55);
  transform: translateX(-50%);
  pointer-events: none;
}

@media (max-width: 1024px) {
  body #mobileNavMenu a.active::after,
  body #mobileNavMenu a.site-nav-current::after,
  body #mobileNavMenu a[aria-current="page"]::after {
    content: none;
  }

  body #mobileNavMenu a > .site-nav-label {
    position: relative;
    display: inline-block;
  }

  body #mobileNavMenu a.active > .site-nav-label::after,
  body #mobileNavMenu a.site-nav-current > .site-nav-label::after,
  body #mobileNavMenu a[aria-current="page"] > .site-nav-label::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -7px;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: #00e676;
    box-shadow: 0 0 8px rgba(0,230,118,0.55);
    transform: translateX(-50%);
    pointer-events: none;
  }
}

/* The standalone copyright strip at the very bottom is intentionally removed. */
.footer-bottom { display: none !important; }

/* ============ 原有 common.css 业务样式 ============ */

/* 只保留真正需要的通用样式；旧版 mobile-nav-menu / #mobileNavMenu 重复实现已删除，避免状态互相覆盖。 */

img, video {
  max-width: 100%;
  height: auto;
}

#mobileMenuBtn {
  display: none !important;
  width: 38px !important;
  height: 38px !important;
  min-width: 38px !important;
  align-items: center !important;
  justify-content: center !important;
  background: rgba(0, 230, 118, 0.08) !important;
  border: 1px solid rgba(0, 230, 118, 0.35) !important;
  border-radius: 10px !important;
  color: #00e676 !important;
  font-size: 18px !important;
  line-height: 1 !important;
  cursor: pointer !important;
  padding: 0 !important;
}

/* ---------- 通用容器全站点级：Laptop / 小桌面 (≤ 1100px)（原 1260 档合并到此档）========== */
@media (max-width: 1100px) {
  .main-container { padding: 20px 16px; }

  .hero {
    padding: 48px 20px 36px !important;
    min-height: auto !important;
    width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .hero-title { font-size: clamp(26px, 4.5vw, 34px) !important; }
  .hero-desc { font-size: clamp(15px, 2vw, 18px) !important; max-width: 100% !important; }
  .hero-badge img { width: 80px !important; height: 80px !important; }

  .quick-access { grid-template-columns: repeat(2, 1fr) !important; }
  .detail-grid { grid-template-columns: repeat(2, 1fr) !important; }

  .signals-grid,
  .news-grid { grid-template-columns: 1fr !important; }

  .ai-card-horizontal {
    flex-direction: column !important;
    gap: 18px !important;
  }
  .ai-card-horizontal .ai-quick-btns {
    grid-template-columns: 1fr 1fr !important;
  }


  .data-ticker-bar { flex-wrap: wrap !important; gap: 12px !important; }
  .ticker-divider { display: none !important; }
  .ticker-item { flex: 1 1 40% !important; }
}

/* ========== 标准：Tablet/手机临界 (≤ 768px)【原 900/960 全部合并到此档，彻底修 900~960 导航消失黑洞 ========== */
@media (max-width: 768px) {
  .navbar .nav-links,
  .nav .nav-links { display: none !important; }

  #mobileMenuBtn { display: flex !important; }

  .nav-container {
    padding: 0 12px !important;
    min-height: 56px !important;
    gap: 8px !important;
  }
  .logo-text { max-width: 110px !important; }
  .logo-title { font-size: 14px !important; white-space: nowrap !important; }
  .logo-sub {
    font-size: 10px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }
  .nav-right {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-wrap: nowrap !important;
  }
  .nav-right .lang-dropdown,
  body .nav-actions .lang-dropdown {
    display: none !important;
    order: 2 !important;
  }
  .nav-right .mobile-menu-btn,
  .nav-right .nav-toggle,
  .nav-right #mobileMenuBtn {
    order: 1 !important;
  }
  .nav-right .btn-login,
  .nav-right .btn-register {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-width: 58px !important;
    min-height: 36px !important;
    padding: 0 14px !important;
    font-size: 14px !important;
    line-height: 1 !important;
    border-radius: 12px !important;
    white-space: nowrap !important;
  }
  .nav-right .btn-login { order: 3 !important; }
  .nav-right .btn-register { order: 4 !important; }

  .main-container { padding: 12px 12px 40px !important; }

  .risk-bar {
    font-size: 12px !important;
    padding: 12px 14px !important;
    margin-bottom: 16px !important;
  }

  .hero {
    padding: 28px 12px 24px !important;
    min-height: auto !important;
    width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }
  .hero-left { max-width: 100% !important; width: 100% !important; }
  .hero-badge {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 8px !important;
    margin-bottom: 16px !important;
  }
  .hero-badge img { width: 56px !important; height: 56px !important; }
  .hero-badge-text { font-size: 13px !important; }
  .hero-title {
    font-size: clamp(22px, 6vw, 26px) !important;
    line-height: 1.3 !important;
    margin-bottom: 12px !important;
  }
  .hero-desc {
    font-size: 14px !important;
    margin-bottom: 18px !important;
  }
  .hero-stats {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 12px 8px !important;
  }
  .hero-stat { text-align: center !important; }
  .hero-stat-value { font-size: 18px !important; min-width: auto !important; }
  .hero-stat-label { font-size: 12px !important; }

  .ai-card-horizontal {
    flex-direction: column !important;
    padding: 16px 14px !important;
    gap: 14px !important;
  }
  .ai-card-horizontal .ai-quick-btns {
    grid-template-columns: 1fr 1fr !important;
  }
  .ai-qbtn { font-size: 13px !important; padding: 10px 6px !important; }

  .quick-access {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
    margin-bottom: 28px !important;
  }

  .data-ticker-bar {
    flex-direction: column !important;
    gap: 12px !important;
    padding: 14px 12px !important;
  }
  .ticker-divider { display: none !important; }
  .ticker-item { flex: none !important; width: 100% !important; }

  .section { margin-bottom: 32px !important; padding: 0 !important; }
  .section-title { font-size: 17px !important; }

  .signals-grid,
  .news-grid {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
  }

  .footer-inner {
    flex-direction: column !important;
    gap: 24px !important;
  }
}

/* ---------- 小屏手机 (≤ 480px)【原 420/560/600 档合并到此档】========== */
@media (max-width: 480px) {
  .hero-title { font-size: 20px !important; }
  .ai-card-horizontal .ai-quick-btns {
    grid-template-columns: 1fr !important;
  }
  .detail-grid { grid-template-columns: 1fr !important; }
  .detail-value { font-size: 18px !important; }
  .detail-label { font-size: 11px !important; }
  .detail-card { padding: 16px !important; }
}

/* ---------- 超小屏 (≤ 360px)【最后防线】========== */
@media (max-width: 360px) {
  .hero-title { font-size: 18px !important; }
  .nav-container { padding-left: 8px !important; padding-right: 8px !important; }
  .logo-icon img { width: 32px !important; height: 32px !important; }
  .logo-text { max-width: 92px !important; }
  .logo-sub { display: none !important; }
  .nav-right { gap: 4px !important; }
  .nav-right .mobile-menu-btn,
  .nav-right .nav-toggle,
  .nav-right #mobileMenuBtn {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
  }
  .nav-right .btn-login,
  .nav-right .btn-register {
    min-width: 48px !important;
    min-height: 34px !important;
    padding: 0 9px !important;
    font-size: 12px !important;
    border-radius: 10px !important;
  }
}

/* ---------- 减少动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  #particle-canvas, .scan-line, .bg-glow, .bg-grid {
    display: none !important;
  }
}

/* ========== 资产明细卡片（统一颜色/字号/间距走 tokens）========== */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.detail-card {
  background: linear-gradient(145deg, rgba(12,28,12,0.65), rgba(6,16,6,0.75));
  border: 1px solid var(--border-green);
  border-radius: 16px;
  padding: 20px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
}
.detail-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--green-primary), transparent);
  opacity: 0.4;
}
.detail-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-green-hover);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4), 0 0 20px rgba(0,230,118,0.06);
}
.detail-label {
  font-size: var(--fs-tag);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.detail-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  text-shadow: 0 0 15px rgba(0,230,118,0.08);
}
.detail-sub {
  font-size: var(--fs-cap-sm);
  color: var(--text-dim);
  margin-top: 6px;
}
.detail-addr {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--green-primary);
  text-decoration: none;
  font-family: 'SF Mono', 'Fira Code', monospace;
  padding: 3px 8px;
  background: var(--green-dim);
  border: 1px solid var(--border-green);
  border-radius: 6px;
  transition: all 0.2s;
}
.detail-addr:hover {
  background: var(--green-dim);
  border-color: var(--border-green-hover);
  box-shadow: 0 0 10px rgba(0,230,118,0.08);
}

/* Use native Japanese glyph metrics after language switching. This avoids
   mixed CJK fallback fonts changing line height inside buttons and cards. */
html[lang="ja"] body,
html[lang="ja"] button,
html[lang="ja"] input,
html[lang="ja"] textarea,
html[lang="ja"] select {
  font-family: Inter, "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif !important;
  font-synthesis: none;
}

/* Mobile GPUs are most sensitive to full-width blur and entrance animations.
   Keep the same colors/layout while avoiding repaint-heavy effects. */
@media (max-width: 768px) {
  .navbar,
  .nav,
  .site-nav,
  .mobile-nav-menu {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }

  .fade-up,
  .delay-1,
  .delay-2,
  .delay-3 {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-robot,
  .ai-hero-avatar,
  .safety-live::before,
  .ai-status::before,
  .pulse {
    animation: none !important;
  }
}

/* Japanese labels are wider than their Chinese equivalents. Keep the mobile
   header on one row without letting the brand or login text paint over the
   menu and neighbouring buttons. The full brand stays available to assistive
   technology while the visible line may use an ellipsis on narrow screens. */
@media (max-width: 768px) {
  html[lang] body .navbar .logo-text,
  html[lang] body .site-nav .logo-text {
    min-width: 0 !important;
    max-width: 100% !important;
    overflow: hidden !important;
  }

  html[lang] body .navbar .logo-title,
  html[lang] body .site-nav .logo-title {
    display: block !important;
    max-width: 100% !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
  }

  html[lang="ja"] body .navbar,
  html[lang="ja"] body .site-nav,
  html[lang="ja"] body .navbar button,
  html[lang="ja"] body .site-nav button {
    font-family: Inter, "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif !important;
  }

  html[lang="ja"] body .navbar .nav-right .btn-login,
  html[lang="ja"] body .site-nav .nav-right .btn-login {
    width: 64px !important;
    min-width: 64px !important;
    padding-right: 7px !important;
    padding-left: 7px !important;
    font-size: 12px !important;
  }

  /* responsive.css uses a generic main.main rule on small screens. Restore
     the space reserved for the fixed video-academy header. */
  html body.video-academy-page #main-content.main {
    padding-top: 90px !important;
  }

  /* Keep the mobile menu attached to the viewport without reintroducing the old legacy open/show state. */
}

/* ========== 学习学院二级页：返回一级页面 ========== */
.lesson-page .lesson-breadcrumb {
  position: relative;
}

.lesson-page .lesson-breadcrumb > a:first-child {
  position: absolute;
  top: -8px;
  right: calc(100% + 24px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 154px;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid rgba(0, 230, 118, 0.58);
  border-radius: 10px;
  background: rgba(0, 230, 118, 0.055);
  color: var(--lesson-green, var(--green-primary, #00e676));
  font-size: 13px;
  font-weight: 650;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.lesson-page .lesson-breadcrumb > a:first-child::before {
  content: "← 返回";
}

html[lang="en"] .lesson-page .lesson-breadcrumb > a:first-child::before {
  content: "← Back to ";
}

html[lang="ja"] .lesson-page .lesson-breadcrumb > a:first-child::before {
  content: "← ";
}

html[lang="zh-TW"] .lesson-page .lesson-breadcrumb > a:first-child::before {
  content: "← 返回";
}

.lesson-page .lesson-breadcrumb > a:first-child:hover {
  border-color: var(--lesson-green, var(--green-primary, #00e676));
  background: rgba(0, 230, 118, 0.11);
  color: #8effbd;
  box-shadow: 0 10px 28px rgba(0, 230, 118, 0.11);
  transform: translateX(-2px);
}

.lesson-page .lesson-breadcrumb > a:first-child:focus-visible {
  outline: 2px solid var(--lesson-green, var(--green-primary, #00e676));
  outline-offset: 3px;
}

.lesson-page .lesson-breadcrumb > a:first-child + span {
  display: none;
}

/* 左侧空间不足时，把按钮移到面包屑上方；手机端沿用同一布局。 */
@media (max-width: 1539px) {
  .lesson-page .lesson-breadcrumb {
    padding-top: 54px;
  }

  .lesson-page .lesson-breadcrumb > a:first-child {
    top: 0;
    right: auto;
    left: 0;
    width: auto;
    min-width: 144px;
  }

  .lesson-page .lesson-breadcrumb > a:first-child:hover {
    transform: translateX(-2px);
  }
}

@media (max-width: 480px) {
  .lesson-page .lesson-breadcrumb {
    padding-top: 50px;
  }

  .lesson-page .lesson-breadcrumb > a:first-child {
    min-width: 138px;
    min-height: 38px;
    padding: 7px 12px;
    font-size: 12.5px;
  }
}

/* Mobile uses its own language control inside the hamburger menu. */
.mobile-lang-switch {
  display: none;
}

@media (max-width: 768px) {
  .mobile-lang-switch {
    display: block;
    width: 100%;
    margin-top: 10px;
    padding: 12px 6px 4px;
    border-top: 1px solid rgba(0, 230, 118, 0.14);
  }

  .mobile-lang-label {
    display: block;
    margin-bottom: 9px;
    color: rgba(232, 245, 233, 0.62);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .mobile-lang-options {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .mobile-lang-option {
    min-height: 40px;
    padding: 9px 10px;
    border: 1px solid rgba(0, 230, 118, 0.12);
    border-radius: 9px;
    background: rgba(0, 0, 0, 0.2);
    color: #b9cbbf;
    font: inherit;
    font-size: 13px;
    text-align: left;
    cursor: pointer;
  }

  .mobile-lang-option:hover,
  .mobile-lang-option:focus-visible,
  .mobile-lang-option.active {
    border-color: rgba(0, 230, 118, 0.48);
    background: rgba(0, 230, 118, 0.1);
    color: #00e676;
    outline: none;
  }
}