/* ==========================================================================
   品牌站点样式表
   设计基调：工业蓝 + 安全橙 + 中性灰，浅色专业风格
   断点：1200 / 992 / 768 / 576
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 主色 */
  --c-brand:        #0E4C6B;
  --c-brand-600:    #0A3A52;
  --c-brand-100:    #E4EEF4;
  --c-accent:       #F26B21;
  --c-accent-600:   #D4550F;
  --c-accent-100:   #FDEDE3;

  /* 中性 */
  --c-ink:          #16202B;
  --c-ink-2:        #3C4A5A;
  --c-muted:        #6B7A8B;
  --c-line:         #DFE6EC;
  --c-line-2:       #EDF1F4;
  --c-bg:           #FFFFFF;
  --c-bg-soft:      #F5F8FA;
  --c-dark:         #0B1F33;
  --c-dark-2:       #122C42;

  /* 语义 */
  --c-ok:           #1E9E6A;
  --c-warn:         #E0A21B;
  --c-bad:          #D9483B;

  /* 排版 */
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system,
          BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Segoe UI", Roboto, sans-serif;

  /* 尺寸 */
  --maxw: 1200px;
  --pad: 20px;
  --radius: 10px;
  --radius-sm: 6px;

  /* 阴影 */
  --sh-1: 0 1px 2px rgba(16, 32, 48, .06), 0 2px 8px rgba(16, 32, 48, .05);
  --sh-2: 0 4px 12px rgba(16, 32, 48, .08), 0 12px 32px rgba(16, 32, 48, .07);
  --sh-3: 0 18px 48px rgba(11, 31, 51, .18);

  --header-h: 68px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4, h5 { margin: 0 0 .6em; line-height: 1.3; font-weight: 700; color: var(--c-ink); }
h1 { font-size: clamp(28px, 4.2vw, 46px); }
h2 { font-size: clamp(23px, 3vw, 34px); }
h3 { font-size: clamp(19px, 2.1vw, 24px); }
h4 { font-size: 17px; }
p  { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin-bottom: .35em; }
strong { font-weight: 700; color: var(--c-brand-600); }
hr { border: 0; border-top: 1px solid var(--c-line); margin: 32px 0; }
table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- 3. 布局工具 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad); }
.container-narrow { max-width: 900px; }
.section { padding: clamp(48px, 7vw, 88px) 0; }
.section-soft { background: var(--c-bg-soft); }
.section-dark { background: var(--c-dark); color: #CBD8E4; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: #A9BACD; }

.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-5 { grid-template-columns: repeat(5, 1fr); }

.flex { display: flex; }
.between { justify-content: space-between; }
.center { align-items: center; }
.wrap { flex-wrap: wrap; }
.gap-8 { gap: 8px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }

.text-center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.mt-24 { margin-top: 24px; } .mt-40 { margin-top: 40px; }

/* ---------- 4. 区块标题 ---------- */
.sec-head { max-width: 760px; margin: 0 auto clamp(28px, 4vw, 48px); text-align: center; }
.sec-head.left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}
.sec-head .lead { color: var(--c-muted); font-size: 17px; margin-top: 12px; }
.sec-head h2::after {
  content: ""; display: block; width: 56px; height: 4px;
  background: var(--c-accent); border-radius: 2px;
  margin: 16px auto 0;
}
.sec-head.left h2::after { margin-left: 0; }

/* ---------- 5. 顶部条 + 导航栏 ---------- */
.topbar {
  background: var(--c-dark); color: #9FB2C4;
  font-size: 13px;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 36px; gap: 12px; flex-wrap: wrap; }
.topbar a { color: #CFDCE8; }
.topbar a:hover { color: #fff; }
.topbar .sep { opacity: .35; margin: 0 8px; }

.site-header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-stuck { box-shadow: var(--sh-1); }
.navbar { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }

.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand-mark {
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  background: var(--c-brand); border-radius: 8px;
  color: #fff;
}
.brand-mark svg { width: 24px; height: 24px; }
/* 品牌标记使用注册商标图片时，去掉方块底色与固定尺寸，按图片比例自适应 */
.brand-mark.has-logo {
  width: auto; height: auto; padding: 0;
  background: transparent; border-radius: 0;
  display: flex; align-items: center;
}
.brand-mark.has-logo img {
  display: block; width: 40px; height: 40px;
  object-fit: contain; border-radius: 8px;
}
.brand-mark.has-logo.on-dark img { background: #fff; padding: 3px; }
.brand-text { line-height: 1.15; }
.brand-name { font-weight: 800; font-size: 17px; letter-spacing: .02em; color: var(--c-brand-600); }
.brand-sub { font-size: 11px; letter-spacing: .18em; color: var(--c-muted); }

.nav-links { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.nav-links > li { margin: 0; position: relative; }
.nav-links a {
  display: block; padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; color: var(--c-ink-2);
  white-space: nowrap;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--c-brand); background: var(--c-brand-100); }
.nav-links a.active { color: var(--c-brand); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--c-accent); border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: 10px; flex: none; }

.burger {
  display: none; width: 44px; height: 44px; border: 1px solid var(--c-line);
  background: #fff; border-radius: var(--radius-sm); cursor: pointer;
  padding: 0; place-items: center;
}
.burger span { display: block; width: 20px; height: 2px; background: var(--c-ink); margin: 3px auto; transition: transform .25s var(--ease), opacity .2s; }
body.nav-open .burger span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
body.nav-open .burger span:nth-child(2) { opacity: 0; }
body.nav-open .burger span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-nav {
  position: fixed; inset: var(--header-h) 0 0; z-index: 88;
  background: #fff; padding: 16px var(--pad) 40px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform .3s var(--ease);
  display: none;
}
body.nav-open .mobile-nav { transform: none; }
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav li { border-bottom: 1px solid var(--c-line-2); }
.mobile-nav a { display: block; padding: 15px 4px; font-weight: 600; font-size: 17px; }
.mobile-nav a.active { color: var(--c-brand); }
.mobile-nav .btn { margin-top: 20px; width: 100%; justify-content: center; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border: 1px solid transparent; border-radius: var(--radius-sm);
  font-weight: 700; font-size: 15px; cursor: pointer; text-align: center;
  transition: transform .15s var(--ease), background .2s, box-shadow .2s, color .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-primary { background: var(--c-accent); color: #fff; box-shadow: 0 6px 16px rgba(242, 107, 33, .25); }
.btn-primary:hover { background: var(--c-accent-600); }
.btn-brand { background: var(--c-brand); color: #fff; }
.btn-brand:hover { background: var(--c-brand-600); }
.btn-ghost { border-color: var(--c-line); background: #fff; color: var(--c-ink); }
.btn-ghost:hover { border-color: var(--c-brand); color: var(--c-brand); }
.btn-outline-light { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,.12); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn svg { width: 18px; height: 18px; }

/* ---------- 7. 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--c-dark) 0%, var(--c-brand-600) 55%, var(--c-brand) 100%);
  color: #fff;
  padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(120% 90% at 80% 10%, #000 20%, transparent 75%);
}
.hero::after {
  content: ""; position: absolute; width: 520px; height: 520px; right: -140px; top: -180px;
  background: radial-gradient(circle, rgba(242,107,33,.35), transparent 65%);
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.hero h1 { color: #fff; font-size: clamp(30px, 4.6vw, 52px); letter-spacing: -.01em; }
.hero h1 .hl { color: #FFB489; }
.hero .lead { font-size: clamp(16px, 1.5vw, 19px); color: #BFD4E2; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.hero-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.tag {
  font-size: 13px; padding: 5px 12px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); color: #E4EEF4;
}
.hero-visual {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 16px; padding: 18px;
  backdrop-filter: blur(4px);
}
.hero-visual img, .hero-visual svg { width: 100%; }

/* 内页横幅 */
.page-banner {
  background: linear-gradient(120deg, var(--c-brand-600), var(--c-brand));
  color: #fff; padding: clamp(38px, 5vw, 64px) 0;
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 60px 100%;
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { color: #fff; margin-bottom: 8px; }
.page-banner p { color: #BFD4E2; margin: 0; max-width: 720px; }
.breadcrumb { font-size: 13px; color: #96B0C4; margin-bottom: 14px; }
.breadcrumb a { color: #CFE0EC; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { margin: 0 8px; opacity: .6; }

/* ---------- 8. 卡片 ---------- */
.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 26px; height: 100%;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;
}
.card-hover:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: #C9D8E2; }
.card-icon {
  width: 48px; height: 48px; border-radius: 10px; display: grid; place-items: center;
  background: var(--c-brand-100); color: var(--c-brand); margin-bottom: 16px;
}
.card-icon svg { width: 24px; height: 24px; }
.card h3, .card h4 { margin-bottom: 8px; }
.card p { color: var(--c-muted); font-size: 15px; margin-bottom: 0; }

.card-dark {
  background: var(--c-dark-2); border: 1px solid rgba(255,255,255,.09); color: #A9BACD;
}
.card-dark h3 { color: #fff; }

/* 数字统计 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 8px 12px; }
.stat-num {
  font-family: var(--font-num); font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700; color: var(--c-accent); line-height: 1.1;
}
.stat-num .unit { font-size: .5em; color: #fff; margin-left: 2px; }
.stat-label { font-size: 14px; color: #96B0C4; margin-top: 6px; }

/* ---------- 9. 工艺流程 步骤条 ---------- */
.steps { display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; counter-reset: step; }
.step { position: relative; text-align: center; padding: 0 4px; }
.step-dot {
  width: 54px; height: 54px; margin: 0 auto 12px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--c-brand); color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 0 0 6px var(--c-brand-100);
}
.step h4 { font-size: 15px; margin-bottom: 4px; }
.step p { font-size: 13px; color: var(--c-muted); margin: 0; }
.step:not(:last-child)::after {
  content: ""; position: absolute; top: 27px; left: 62%; right: -38%;
  height: 2px; background: repeating-linear-gradient(90deg, var(--c-line) 0 6px, transparent 6px 12px);
}

/* ---------- 10. 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-line); border-radius: var(--radius); background: #fff; }
.table-wrap table { min-width: 620px; font-size: 15px; }
.table-wrap th, .table-wrap td { padding: 12px 16px; border-bottom: 1px solid var(--c-line-2); text-align: left; }
.table-wrap thead th {
  background: var(--c-brand); color: #fff; font-weight: 700; font-size: 14px;
  white-space: nowrap; position: sticky; top: 0;
}
.table-wrap tbody tr:nth-child(even) { background: #FAFCFD; }
.table-wrap tbody tr:hover { background: var(--c-brand-100); }
.table-wrap td:first-child { font-weight: 700; color: var(--c-brand-600); }
.table-note { font-size: 13px; color: var(--c-muted); margin-top: 12px; }
.table-scroll-hint { display: none; font-size: 12px; color: var(--c-muted); margin-bottom: 8px; }

/* 等级色标 */
.lv { display: inline-block; min-width: 30px; padding: 2px 9px; border-radius: 4px; font-size: 13px; font-weight: 700; text-align: center; }
.lv-4 { background: #E6F6EE; color: #14714C; }   /* 优 */
.lv-3 { background: #E9F2FB; color: #175C86; }   /* 良 */
.lv-2 { background: #FDF4E3; color: #8A6316; }   /* 可 */
.lv-1 { background: #FCEBE9; color: #A63026; }   /* 差 */

/* ---------- 11. 标签页 / 折叠 ---------- */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.tab {
  padding: 9px 20px; border: 1px solid var(--c-line); background: #fff;
  border-radius: 999px; font-weight: 600; font-size: 15px; cursor: pointer;
  transition: all .2s;
}
.tab:hover { border-color: var(--c-brand); color: var(--c-brand); }
.tab.is-active { background: var(--c-brand); border-color: var(--c-brand); color: #fff; }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: fadeUp .35s var(--ease) both; }

.accordion { border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.acc-item + .acc-item { border-top: 1px solid var(--c-line); }
.acc-head {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 18px 52px 18px 22px; font-weight: 700; font-size: 16px; position: relative;
}
.acc-head::after {
  content: ""; position: absolute; right: 22px; top: 26px;
  width: 9px; height: 9px; border-right: 2px solid var(--c-brand); border-bottom: 2px solid var(--c-brand);
  transform: rotate(45deg); transition: transform .25s var(--ease);
}
.acc-item.open .acc-head::after { transform: rotate(225deg); }
.acc-body { display: none; padding: 0 22px 20px; color: var(--c-ink-2); font-size: 15px; }
.acc-item.open .acc-body { display: block; animation: fadeUp .3s var(--ease) both; }

/* ---------- 12. 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.news-thumb { aspect-ratio: 16 / 9; background: var(--c-bg-soft); display: grid; place-items: center; position: relative; overflow: hidden; }
.news-thumb svg { width: 100%; height: 100%; }
.news-cat {
  position: absolute; left: 12px; top: 12px; z-index: 2;
  font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 4px;
  background: rgba(14, 76, 107, .92); color: #fff;
}
.news-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.news-meta { font-size: 13px; color: var(--c-muted); margin-bottom: 8px; }
.news-card h3 { font-size: 18px; margin-bottom: 10px; line-height: 1.5; }
.news-excerpt { color: var(--c-muted); font-size: 14.5px; flex: 1; }
.news-more { font-weight: 700; color: var(--c-brand); font-size: 14.5px; }
.news-more:hover { color: var(--c-accent); }

.article-full { display: none; }

/* 文章弹层 */
.reader {
  position: fixed; inset: 0; z-index: 120; display: none;
  background: rgba(11, 31, 51, .55);
  padding: 24px;
  overflow-y: auto;
}
.reader.is-open { display: block; animation: fadeIn .2s both; }
.reader-box {
  max-width: 820px; margin: 0 auto; background: #fff; border-radius: 14px;
  box-shadow: var(--sh-3); overflow: hidden; animation: fadeUp .3s var(--ease) both;
}
.reader-head {
  padding: 26px 30px 20px; border-bottom: 1px solid var(--c-line);
  position: sticky; top: 0; background: #fff; z-index: 2;
}
.reader-close {
  position: absolute; right: 18px; top: 18px; width: 38px; height: 38px;
  border-radius: 50%; border: 1px solid var(--c-line); background: #fff; cursor: pointer;
  display: grid; place-items: center;
}
.reader-close:hover { background: var(--c-bg-soft); }
.reader-content { padding: 26px 30px 34px; }
.reader-content h3 { margin-top: 26px; font-size: 20px; }
.reader-content p, .reader-content li { color: var(--c-ink-2); }

/* ---------- 13. 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 700; color: var(--c-ink-2); }
.field label .req { color: var(--c-accent); }
.field input, .field select, .field textarea {
  padding: 11px 14px; border: 1px solid var(--c-line); border-radius: var(--radius-sm);
  background: #fff; font-size: 15px; width: 100%;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--c-brand); box-shadow: 0 0 0 3px rgba(14, 76, 107, .12);
}
.field textarea { min-height: 120px; resize: vertical; }
.field .hint { font-size: 12.5px; color: var(--c-muted); }
.field .err { font-size: 13px; color: var(--c-bad); display: none; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--c-bad); }
.field.invalid .err { display: block; }

.form-panel { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: clamp(22px, 3vw, 34px); box-shadow: var(--sh-1); }

/* ---------- 14. 联系信息 / 页脚 ---------- */
.contact-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 20px; }
.contact-item .ci-icon {
  width: 42px; height: 42px; border-radius: 10px; flex: none;
  background: var(--c-brand-100); color: var(--c-brand); display: grid; place-items: center;
}
.contact-item .ci-icon svg { width: 21px; height: 21px; }
.contact-item h4 { margin: 0 0 2px; font-size: 15px; }
.contact-item p { margin: 0; color: var(--c-muted); font-size: 15px; }

.site-footer { background: var(--c-dark); color: #93A8BB; padding: 60px 0 0; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 32px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: .03em; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: #93A8BB; }
.site-footer a:hover { color: #fff; }
.site-footer .brand-name { color: #fff; }
.site-footer .brand-sub { color: var(--c-muted); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 44px; padding: 18px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13.5px;
}

/* ---------- 15. 移动端浮动条 ---------- */
.float-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 95;
  display: none; background: #fff; border-top: 1px solid var(--c-line);
  box-shadow: 0 -4px 16px rgba(16,32,48,.08);
}
.float-bar .fb-inner { display: grid; grid-template-columns: 1fr 1fr 1fr; }
.float-bar a {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 9px 4px; font-size: 12px; font-weight: 600; color: var(--c-ink-2);
}
.float-bar a svg { width: 20px; height: 20px; }
.float-bar a.fb-cta { background: var(--c-accent); color: #fff; }

.to-top {
  position: fixed; right: 18px; bottom: 78px; z-index: 94;
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--c-line);
  background: #fff; box-shadow: var(--sh-1); cursor: pointer; display: none;
  place-items: center; color: var(--c-brand);
}
.to-top.show { display: grid; }

/* Toast */
.toast {
  position: fixed; left: 50%; top: 88px; transform: translate(-50%, -16px); z-index: 200;
  background: var(--c-dark); color: #fff; padding: 13px 22px; border-radius: 8px;
  box-shadow: var(--sh-3); font-size: 15px; opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s var(--ease); max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 16. 其它组件 ---------- */
.callout {
  border-left: 4px solid var(--c-accent); background: var(--c-accent-100);
  padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 15px; color: #6E3B12;
}
.callout-info { border-color: var(--c-brand); background: var(--c-brand-100); color: #17455F; }
.callout p:last-child { margin-bottom: 0; }

.badge-row { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  font-size: 13px; font-weight: 600; padding: 5px 12px; border-radius: 999px;
  background: var(--c-brand-100); color: var(--c-brand-600);
}

.spec-list { list-style: none; margin: 0; padding: 0; }
.spec-list li { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px dashed var(--c-line); }
.spec-list li:last-child { border-bottom: 0; }
.spec-list .k { color: var(--c-muted); font-size: 15px; }
.spec-list .v { font-weight: 700; text-align: right; }

.cta-strip {
  background: linear-gradient(120deg, var(--c-brand-600), var(--c-accent));
  color: #fff; border-radius: 14px; padding: clamp(28px, 4vw, 48px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.cta-strip h2 { color: #fff; margin-bottom: 6px; }
.cta-strip p { margin: 0; color: rgba(255,255,255,.88); }

/* 结构图 */
.struct-wrap { background: var(--c-bg-soft); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 20px; }
.struct-wrap svg { width: 100%; height: auto; }
.legend { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; margin-top: 20px; font-size: 14.5px; }
.legend div { display: flex; gap: 9px; align-items: center; }
.legend b {
  width: 22px; height: 22px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: var(--c-brand); color: #fff; font-size: 12px;
}

/* 滚动出现 */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .6s var(--ease), transform .6s var(--ease); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .burger { display: grid; }
  .mobile-nav { display: block; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 560px; }
  .steps { grid-template-columns: repeat(4, 1fr); gap: 24px 12px; }
  .step:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .news-grid, .g-3 { grid-template-columns: repeat(2, 1fr); }
  .g-4, .g-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --pad: 16px; }
  .g-2, .g-3, .g-4, .g-5, .news-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .float-bar { display: block; }
  body { padding-bottom: 58px; }
  .table-scroll-hint { display: block; }
  .section { padding: 40px 0; }
  .table-wrap table { min-width: 520px; font-size: 14px; }
  .table-wrap th, .table-wrap td { padding: 10px 12px; }
  .legend { grid-template-columns: 1fr; }
  .reader { padding: 0; }
  .reader-box { border-radius: 0; min-height: 100%; }
  .reader-head, .reader-content { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 576px) {
  .hero-actions .btn { width: 100%; }
  .cta-strip { text-align: center; }
  .cta-strip .btn { width: 100%; }
  .btn-lg { padding: 13px 22px; }
}

/* ---------- 18. 打印 / 动效偏好 ---------- */
@media print {
  .site-header, .topbar, .float-bar, .to-top, .hero-actions, .site-footer { display: none !important; }
  body { padding: 0; }
  .card, .table-wrap { break-inside: avoid; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}
.stat-num .unit {
  color: #333;
}