/* ============================================================
   建沅网络官网 · 科技风样式
   设计语言：灰白底 / 石墨深蓝 / 科技橙(#ff5e00) / 发光与光效
   ============================================================ */
:root {
  --bg: #f5f7fa;
  --bg-soft: #eef2f7;
  --card: #ffffff;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-soft: #64748b;
  --dark: #0b1220;
  --dark-2: #101a2e;
  --orange: #ff5e00;
  --orange-2: #ff9040;
  --orange-glow: rgba(255, 94, 0, 0.32);
  --blue: #2563eb;
  --line: #e5eaf1;
  --line-2: #dbe2ec;
  --ok: #10b981;
  --danger: #ef4444;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 14px 38px rgba(15, 23, 42, 0.12);
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
/* 锚点跳转预留吸顶导航高度（原生兜底，配合JS平滑滚动） */
section[id], article[id], div[id] { scroll-margin-top: 96px; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 全局容器（科技风替换旧图纸框） ============ */
.sheet { min-height: 100vh; }
.sheet-corner { display: none; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header::before {
  content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-2) 35%, transparent 65%);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 72px; }
.logo { display: flex; align-items: center; gap: 11px; }
.logo img { border-radius: 9px; }
.logo-text b { font-size: 20px; font-weight: 800; letter-spacing: 0.04em; display: block; line-height: 1.25; }
.logo-text i { font-family: var(--mono); font-style: normal; font-size: 9px; letter-spacing: 0.24em; color: var(--orange); }
.main-nav { display: flex; gap: 2px; margin-left: auto; flex-wrap: wrap; }
.main-nav a {
  font-size: 15px; padding: 7px 13px; color: var(--ink-2);
  border-radius: 8px; transition: all 0.16s; position: relative;
}
.main-nav a:hover { color: var(--ink); background: var(--bg-soft); }
.main-nav a.on { color: var(--orange); font-weight: 600; background: rgba(255, 94, 0, 0.08); }

/* —— 服务下拉菜单 —— */
.nav-drop-wrap { position: relative; }
.nav-drop-wrap > .drop-toggle { display: inline-flex; align-items: center; gap: 5px; padding: 7px 13px; border-radius: 8px; font-size: 15px; color: var(--ink-2); }
.nav-drop-wrap > .drop-toggle .caret { font-size: 11px; transition: transform 0.18s; color: #b0bccb; }
.nav-drop-wrap:hover > .drop-toggle, .nav-drop-wrap.on > .drop-toggle { color: var(--orange); background: rgba(255, 94, 0, 0.08); font-weight: 600; }
.nav-drop-wrap:hover > .drop-toggle .caret { transform: rotate(180deg); }
.nav-drop {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 600px; max-width: min(720px, 86vw); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 24px 64px rgba(15, 23, 42, 0.18); opacity: 0; visibility: hidden;
  transition: all 0.2s ease; z-index: 99; overflow: hidden;
  background: linear-gradient(160deg, rgba(255, 94, 0, 0.045), #fff 42%);
}
.nav-drop-wrap:hover .nav-drop, .nav-drop-wrap:focus-within .nav-drop { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-drop::before { content: none; }
.nav-drop::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-2) 40%, transparent 85%);
}
.nav-drop-inner { padding: 18px 20px 8px; max-height: 430px; overflow-y: auto; }
.drop-group { min-width: 0; }
.drop-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 10px; min-width: 560px; }
.drop-group h5 {
  font-size: 13px; color: var(--ink); font-weight: 700; margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.drop-group h5::before { content: ""; width: 8px; height: 8px; border-radius: 3px; background: linear-gradient(135deg, var(--orange), var(--orange-2)); flex-shrink: 0; }
.drop-cols a {
  display: flex; align-items: center; gap: 9px; padding: 8px 11px; border-radius: 9px;
  font-size: 13.5px; color: var(--ink-2); transition: all 0.14s; border: 1px solid transparent;
}
.drop-cols a span {
  font-family: var(--mono); font-size: 10.5px; color: var(--orange); opacity: 0.8;
  background: rgba(255, 94, 0, 0.08); border-radius: 5px; padding: 1px 6px; flex-shrink: 0;
}
.drop-cols a:hover { background: rgba(255, 94, 0, 0.07); color: var(--orange); border-color: rgba(255, 94, 0, 0.25); transform: translateX(3px); }
.drop-all {
  display: flex; align-items: center; justify-content: center; gap: 6px; padding: 13px; font-size: 13.5px; font-weight: 700;
  color: var(--orange); border-top: 1px solid var(--line);
  background: linear-gradient(0deg, rgba(255, 94, 0, 0.05), transparent);
}
.drop-all:hover { background: rgba(255, 94, 0, 0.1); letter-spacing: 0.03em; }
.header-cta {
  font-size: 14px; font-weight: 600; padding: 9px 18px; border-radius: 999px;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  color: #fff; white-space: nowrap; transition: all 0.18s;
  box-shadow: 0 4px 16px var(--orange-glow);
}
.header-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 22px var(--orange-glow); }
.header-rule { display: none; }
.nav-toggle { display: none; background: none; border: 1.5px solid var(--line-2); border-radius: 8px; font-size: 18px; padding: 4px 10px; cursor: pointer; margin-left: auto; color: var(--ink); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 12px 26px; border-radius: 999px;
  border: none; cursor: pointer; transition: all 0.18s; font-family: var(--sans);
}
.btn span { transition: transform 0.18s; }
.btn-primary {
  background: linear-gradient(135deg, var(--orange), var(--orange-2)); color: #fff;
  box-shadow: 0 6px 20px var(--orange-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px var(--orange-glow); }
.btn-primary:hover span { transform: translateX(3px); }
.btn-ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line-2); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange); box-shadow: 0 6px 18px rgba(255, 94, 0, 0.12); }
.btn-orange { background: linear-gradient(135deg, var(--orange), var(--orange-2)); color: #fff; box-shadow: 0 6px 20px var(--orange-glow); }
.btn-orange:hover { transform: translateY(-2px); box-shadow: 0 10px 28px var(--orange-glow); }
.btn-ghost-light { background: rgba(255, 255, 255, 0.08); color: #f8fafc; border: 1px solid rgba(255, 255, 255, 0.25); }
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.5); }
.btn-big { padding: 15px 34px; font-size: 16px; }

/* ============ 区块通用 ============ */
.sec { padding: 76px 0; }
.sec-alt { background: var(--bg-soft); }
.sec-head { display: flex; align-items: flex-end; gap: 20px; margin-bottom: 42px; flex-wrap: wrap; }
.sec-no {
  font-family: var(--mono); font-size: 38px; font-weight: 700; line-height: 1;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  padding-bottom: 6px;
}
.sec-no-light { background: linear-gradient(135deg, #ff7a2f, #ffb03a); -webkit-background-clip: text; background-clip: text; }
.sec-title { font-size: 31px; font-weight: 800; line-height: 1.3; letter-spacing: 0.01em; }
.sec-sub { color: var(--ink-soft); font-size: 15px; margin-top: 7px; }
.sec-more { margin-left: auto; font-size: 14px; font-weight: 600; color: var(--orange); transition: all 0.15s; }
.sec-more:hover { gap: 6px; letter-spacing: 0.04em; }

/* ============ HERO ============ */
.hero {
  padding: 72px 0 64px;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(255, 94, 0, 0.07), transparent 60%),
    radial-gradient(700px 380px at -10% 110%, rgba(37, 99, 235, 0.05), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: 1.12fr 0.88fr; gap: 44px; align-items: center; }
.hero-kicker {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.16em;
  color: var(--orange); display: flex; align-items: center; gap: 12px;
}
.kicker-line { display: inline-block; width: 44px; height: 3px; border-radius: 2px; background: linear-gradient(90deg, var(--orange), var(--orange-2)); }
.hero-title { font-size: 56px; line-height: 1.2; font-weight: 800; margin: 22px 0 20px; letter-spacing: 0.01em; }
.hero-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--orange) 20%, var(--orange-2) 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { color: var(--ink-soft); font-size: 17px; }
.hero-mission {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 14px;
  font-size: 15px; font-weight: 700; color: var(--orange);
  background: rgba(255, 94, 0, 0.06); border: 1px solid rgba(255, 94, 0, 0.22);
  border-radius: 999px; padding: 6px 18px;
}
.hero-actions { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-facts { display: flex; gap: 0; margin-top: 48px; flex-wrap: wrap; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.hero-facts > div { flex: 1; min-width: 130px; padding: 18px 20px; border-right: 1px solid var(--line); transition: background 0.15s; }
.hero-facts > div:last-child { border-right: none; }
.hero-facts > div:hover { background: rgba(255, 94, 0, 0.04); }
.hero-facts dt { font-family: var(--mono); font-size: 27px; font-weight: 700; line-height: 1.25; background: linear-gradient(135deg, var(--ink), #3b4a63); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-facts > div:hover dt { background: linear-gradient(135deg, var(--orange), var(--orange-2)); -webkit-background-clip: text; background-clip: text; }
.hero-facts dd { font-size: 12.5px; color: var(--ink-soft); margin-top: 2px; }
.hero-blueprint svg { width: 100%; height: auto; filter: drop-shadow(0 18px 40px rgba(15, 23, 42, 0.10)); }

/* ============ 首页右侧轮播（hero-blueprint 图片版） ============ */
.hero-slider { position: relative; width: 100%; border-radius: 18px; overflow: hidden; background: #fff; border: 1px solid #e2e8f0; box-shadow: 0 18px 40px rgba(15, 23, 42, 0.10); }
.slider-viewport { position: relative; aspect-ratio: 520 / 560; }
.slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity .7s ease; }
.slide.active { opacity: 1; visibility: visible; }
.slide a { display: block; width: 100%; height: 100%; }
.slide img { width: 100%; height: 100%; object-fit: cover; display: block; }
.slider-prev, .slider-next { position: absolute; top: 50%; transform: translateY(-50%); z-index: 2; width: 36px; height: 36px; border-radius: 50%; border: none; background: rgba(255,255,255,0.85); color: #0f172a; font-size: 20px; line-height: 1; cursor: pointer; box-shadow: 0 2px 8px rgba(15,23,42,.15); opacity: 0; transition: opacity .25s, background .2s; }
.hero-slider:hover .slider-prev, .hero-slider:hover .slider-next { opacity: 1; }
.slider-prev { left: 12px; }
.slider-next { right: 12px; }
.slider-prev:hover, .slider-next:hover { background: var(--orange); color: #fff; }
.slider-dots { position: absolute; bottom: 12px; left: 0; right: 0; display: flex; justify-content: center; gap: 8px; z-index: 2; }
.slider-dots .dot { width: 8px; height: 8px; border-radius: 50%; border: none; background: rgba(255,255,255,.7); cursor: pointer; padding: 0; transition: background .2s, transform .2s; }
.slider-dots .dot.on { background: var(--orange); transform: scale(1.3); }

/* ============ 服务列表（卡片行） ============ */
.svc-table { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.svc-row {
  display: grid; grid-template-columns: 58px 1fr 34px; grid-template-areas: "code name arrow" "code tag arrow";
  align-items: center; gap: 4px 14px;
  padding: 18px 20px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--line);
  transition: all 0.18s; position: relative; overflow: hidden;
}
.svc-row::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--orange), var(--orange-2));
  opacity: 0; transition: opacity 0.18s;
}
.svc-row:hover { border-color: rgba(255, 94, 0, 0.45); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.svc-row:hover::before { opacity: 1; }
.svc-row.featured { border-color: rgba(255, 94, 0, 0.35); background: linear-gradient(135deg, rgba(255, 94, 0, 0.04), var(--card) 55%); }
.svc-code { grid-area: code; font-family: var(--mono); font-size: 12px; font-weight: 600; color: var(--orange); background: rgba(255, 94, 0, 0.08); border-radius: 8px; padding: 5px 0; text-align: center; align-self: start; }
.svc-name { grid-area: name; font-weight: 700; font-size: 16.5px; display: flex; align-items: center; gap: 8px; }
.svc-flag { font-style: normal; font-size: 10.5px; font-weight: 600; color: #fff; background: linear-gradient(135deg, var(--orange), var(--orange-2)); padding: 1px 8px; border-radius: 999px; line-height: 1.7; letter-spacing: 0.06em; }
.svc-tag { grid-area: tag; color: var(--ink-soft); font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.svc-cat { display: none; }
.svc-arrow { grid-area: arrow; font-size: 18px; color: #cbd5e1; transition: all 0.18s; text-align: right; }
.svc-row:hover .svc-arrow { color: var(--orange); transform: translateX(4px); }
.svc-cat-divider { display: flex; align-items: center; gap: 14px; padding: 28px 0 14px; grid-column: 1 / -1; }
.svc-cat-divider span { font-size: 18px; font-weight: 700; color: var(--ink); letter-spacing: 0.02em; }
.svc-cat-divider i { flex: 1; height: 1px; background: linear-gradient(90deg, var(--line-2), transparent); }

/* ============ 方法论 ============ */
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.method-card {
  padding: 30px 26px; border-radius: var(--radius); background: var(--card);
  border: 1px solid var(--line); position: relative; transition: all 0.18s; overflow: hidden;
}
.method-card::after {
  content: ""; position: absolute; right: -30px; top: -30px; width: 110px; height: 110px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 94, 0, 0.09), transparent 70%);
}
.method-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(255, 94, 0, 0.35); }
.m-no {
  font-family: var(--mono); font-size: 14px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--ink), #29395c); display: inline-flex; width: 36px; height: 36px;
  border-radius: 10px; align-items: center; justify-content: center; margin-bottom: 16px;
}
.method-card:nth-child(2) .m-no { background: linear-gradient(135deg, var(--orange), var(--orange-2)); }
.method-card:nth-child(3) .m-no { background: linear-gradient(135deg, #2463eb, #60a5fa); }
.method-card h3 { font-size: 19px; margin-bottom: 10px; font-weight: 700; }
.method-card p { font-size: 14.5px; color: var(--ink-soft); }

/* ============ GEO 深色带 ============ */
.geo-strip {
  background:
    radial-gradient(800px 400px at 90% 0%, rgba(255, 94, 0, 0.14), transparent 55%),
    radial-gradient(600px 300px at 0% 100%, rgba(37, 99, 235, 0.12), transparent 55%),
    var(--dark);
  color: #e6edf6;
  border-radius: 0;
}
.geo-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.geo-strip .geo-copy h2 { font-size: 34px; line-height: 1.35; margin: 14px 0 16px; font-weight: 800; }
.geo-lead { color: #9fb0c6; font-size: 15.5px; }
.geo-points { list-style: none; margin: 20px 0 28px; }
.geo-points li { padding: 9px 0 9px 26px; position: relative; color: #cdd8e6; font-size: 15px; border-bottom: 1px solid rgba(255, 255, 255, 0.07); }
.geo-points li::before { content: "▸"; position: absolute; left: 2px; color: var(--orange); }
.geo-terminal {
  background: #060c17; border: 1px solid #1c2c47; border-radius: var(--radius);
  padding: 26px 28px; font-family: var(--mono); position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}
.geo-terminal::before { content: ""; position: absolute; top: 0; left: 24px; right: 24px; height: 2px; background: linear-gradient(90deg, var(--orange), transparent 70%); border-radius: 2px; }
.gt-title { font-size: 12px; margin-bottom: 14px; letter-spacing: 0.1em; color: #5d718a; }
.gt-q { font-size: 14px; color: #9fc3dd; margin-bottom: 12px; }
.gt-a { font-size: 14px; line-height: 1.9; color: #d7e3ec; }
.gt-a b { color: var(--orange); }
.gt-cursor { animation: blink 1.1s infinite; color: var(--orange); }
@keyframes blink { 50% { opacity: 0; } }
.gt-ref { font-size: 11.5px; color: #4d6480; margin-top: 14px; }

/* ============ 案例 ============ */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); overflow: hidden; transition: all 0.2s; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: rgba(255, 94, 0, 0.35); }
.case-card img { aspect-ratio: 16/9; object-fit: cover; width: 100%; }
.case-body { padding: 20px 22px 24px; }
.case-meta { font-family: var(--mono); font-size: 12px; color: var(--orange); margin-bottom: 8px; font-weight: 600; }
.case-body h3 { font-size: 18px; margin-bottom: 8px; font-weight: 700; }
.case-sum { font-size: 14px; color: var(--ink-soft); }
.case-detail-block { border-top: 1px solid var(--line); padding: 36px 0 46px; }
.case-detail-block + .case-detail-block { margin-top: 10px; }
.case-detail-grid { display: grid; grid-template-columns: 1fr 330px; gap: 36px; }
.case-detail-block h2 { font-size: 24px; margin: 4px 0 10px; font-weight: 800; }
.cd-content { margin-top: 14px; font-size: 15px; color: var(--ink-2); }
.cd-side img { border-radius: var(--radius-sm); margin-bottom: 16px; }
.cd-metrics { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; background: var(--card); box-shadow: var(--shadow); }
.cd-metrics h4 { font-size: 16px; margin-bottom: 10px; font-weight: 700; }
.metric-row { display: flex; justify-content: space-between; align-items: baseline; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; color: var(--ink-soft); }
.metric-row b { font-family: var(--mono); font-size: 19px; font-weight: 700; color: var(--orange); }

/* ============ 免费授课（渐变横幅） ============ */
.lecture-strip { background: linear-gradient(120deg, #ff5e00 0%, #ff7a2f 55%, #ff9040 100%); color: #fff; }
.lecture-inner { display: grid; grid-template-columns: 110px 1fr auto; gap: 30px; align-items: center; }
.lecture-copy h2 { font-size: 27px; margin-bottom: 10px; font-weight: 800; }
.lecture-copy p { color: rgba(255, 255, 255, 0.92); font-size: 15px; }
.lecture-copy p b { color: #fff; }
.lecture-topics { margin-top: 8px; font-family: var(--mono); font-size: 12.5px; color: rgba(255, 255, 255, 0.85); }
.lecture-badge { animation: spin 26s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.lecture-strip .lecture-badge circle, .lecture-strip .lecture-badge text { stroke: #fff; fill: none; }
.lecture-strip .lecture-badge text { fill: #fff; stroke: none; }

/* ============ 资讯 ============ */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.news-item {
  border-radius: var(--radius); background: var(--card); border: 1px solid var(--line);
  padding: 20px 20px 22px; transition: all 0.18s; display: flex; flex-direction: column;
}
.news-item:hover { border-color: rgba(255, 94, 0, 0.4); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.news-item img { border-radius: var(--radius-sm); margin-bottom: 12px; }
.news-item h3 { font-size: 15.5px; line-height: 1.55; margin: 6px 0; font-weight: 700; }
.news-meta { font-family: var(--mono); font-size: 11.5px; color: #94a3b8; }
.news-sum { font-size: 13.5px; color: var(--ink-soft); }
.news-lead { grid-column: span 2; grid-row: span 2; }
.news-lead h3 { font-size: 21px; font-weight: 800; }

.news-list-page { display: flex; flex-direction: column; gap: 14px; }
.news-row {
  display: flex; gap: 24px; padding: 22px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--card); transition: all 0.16s; align-items: center;
}
.news-row:hover { border-color: rgba(255, 94, 0, 0.4); box-shadow: var(--shadow); transform: translateY(-2px); }
.news-row h2 { font-size: 20px; margin: 6px 0; font-weight: 700; }
.nr-cover { width: 300px; flex-shrink: 0; }
.nr-cover img { border-radius: var(--radius-sm); aspect-ratio: 16/9; object-fit: cover; }
.nr-cat { color: var(--orange); font-weight: 600; }
.nr-src { color: var(--blue); }
.news-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 26px; }
.news-filter a { font-size: 13.5px; padding: 7px 16px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--ink-soft); font-weight: 500; transition: all 0.15s; }
.news-filter a i { font-style: normal; color: #94a3b8; font-size: 11px; margin-left: 4px; }
.news-filter a:hover { border-color: var(--orange); color: var(--orange); }
.news-filter a.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.news-filter a.on i { color: var(--orange-2); }
.news-search { display: flex; gap: 8px; margin-left: auto; align-items: center; }
.news-search input { border: 1px solid var(--line-2); border-radius: 999px; padding: 7px 18px; font-size: 13.5px; min-width: 200px; outline: none; background: #fff; }
.news-search input:focus { border-color: var(--orange); }

/* ============ 前台AI对话框 ============ */
.chat-launcher {
  position: fixed; right: 22px; bottom: 22px; z-index: 900;
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  color: #fff; border: none; border-radius: 999px; padding: 12px 20px;
  font-size: 14.5px; font-weight: 700; font-family: var(--sans);
  box-shadow: 0 10px 30px rgba(255, 94, 0, 0.35); cursor: pointer;
  transition: transform .15s, box-shadow .15s;
}
.chat-launcher:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(255, 94, 0, 0.45); }
.chat-launcher.hide { display: none; }
.chat-panel {
  position: fixed; right: 22px; bottom: 22px; z-index: 901;
  width: 372px; max-width: calc(100vw - 32px); height: 540px; max-height: calc(100vh - 44px);
  background: var(--bg); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 24px 64px rgba(15, 23, 42, 0.22);
  display: none; flex-direction: column; overflow: hidden;
}
.chat-panel.open { display: flex; animation: chatIn .18s ease; }
@keyframes chatIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.chat-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; color: #fff;
  background: linear-gradient(135deg, #0f172a, #1e2c45);
  border-bottom: 3px solid var(--orange);
}
.chat-head b { font-size: 15px; display: block; }
.chat-head i { font-style: normal; font-size: 11.5px; opacity: .75; }
.chat-close { background: none; border: none; color: #fff; font-size: 22px; line-height: 1; cursor: pointer; padding: 2px 6px; border-radius: 6px; }
.chat-close:hover { background: rgba(255, 255, 255, 0.12); }
.chat-body { flex: 1; overflow-y: auto; padding: 14px 12px 8px; }
.chat-msg { display: flex; margin-bottom: 10px; }
.chat-msg.user { justify-content: flex-end; }
.chat-bubble {
  max-width: 84%; padding: 10px 13px; border-radius: 12px; font-size: 13.5px; line-height: 1.75;
  background: var(--card); border: 1px solid var(--line); color: var(--ink);
}
.chat-msg.user .chat-bubble { background: linear-gradient(135deg, var(--orange), var(--orange-2)); border: none; color: #fff; border-bottom-right-radius: 4px; }
.chat-msg.bot .chat-bubble { border-bottom-left-radius: 4px; }
.chat-bubble .c-line { margin: 2px 0; }
.chat-bubble b { color: var(--ink); }
.chat-msg.typing .chat-bubble { display: inline-flex; gap: 4px; align-items: center; padding: 14px 16px; }
.chat-msg .dot { width: 7px; height: 7px; border-radius: 50%; background: #c7d0dc; animation: chatDot 1s infinite; }
.chat-msg .dot:nth-child(2) { animation-delay: .15s; }
.chat-msg .dot:nth-child(3) { animation-delay: .3s; }
@keyframes chatDot { 0%, 60%, 100% { opacity: .35; } 30% { opacity: 1; } }
.chat-chips { display: flex; flex-wrap: wrap; gap: 7px; padding: 2px 2px 8px; }
.chat-chip {
  border: 1px solid rgba(255, 94, 0, 0.35); background: rgba(255, 94, 0, 0.06); color: #b43d0f;
  border-radius: 999px; padding: 6px 13px; font-size: 12.5px; cursor: pointer; font-family: var(--sans);
  transition: all .14s;
}
.chat-chip:hover { background: rgba(255, 94, 0, 0.14); border-color: var(--orange); }
.chat-links { display: flex; flex-wrap: wrap; gap: 6px; margin: -2px 0 10px 6px; }
.chat-links a {
  display: inline-flex; align-items: center; gap: 5px; text-decoration: none;
  background: var(--ink); color: #fff; border-radius: 8px; padding: 6px 11px; font-size: 12px; font-weight: 600;
}
.chat-links a:hover { background: var(--orange); }
.chat-links a i { font-style: normal; font-size: 10.5px; opacity: .7; font-weight: 400; }
.chat-input { display: flex; gap: 8px; padding: 10px 12px; background: var(--card); border-top: 1px solid var(--line); }
.chat-input input {
  flex: 1; border: 1px solid var(--line-2); border-radius: 10px; padding: 10px 13px; font-size: 13.5px;
  outline: none; font-family: var(--sans); background: var(--bg);
}
.chat-input input:focus { border-color: var(--orange); }
.chat-input button {
  border: none; border-radius: 10px; padding: 0 18px; font-size: 13.5px; font-weight: 700; cursor: pointer;
  background: linear-gradient(135deg, var(--orange), var(--orange-2)); color: #fff;
}
.chat-input button:disabled { opacity: .6; cursor: wait; }
.chat-foot { text-align: center; font-size: 11px; color: #9aa7b6; padding: 6px 10px 9px; background: var(--card); }
.chat-foot a { color: var(--orange); text-decoration: none; }
@media (max-width: 640px) {
  .chat-launcher { right: 14px; bottom: 14px; padding: 11px 16px; }
  .chat-launcher span { display: none; }
  .chat-panel { right: 8px; left: 8px; bottom: 8px; width: auto; height: 72vh; }
}
.empty-tip { padding: 50px 0; color: var(--ink-soft); text-align: center; }
.pager { display: flex; gap: 8px; justify-content: center; margin-top: 36px; font-family: var(--mono); font-size: 13.5px; }
.pager a, .pager span { padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line-2); background: var(--card); }
.pager a:hover { border-color: var(--orange); color: var(--orange); }
.pager span.on { background: linear-gradient(135deg, var(--orange), var(--orange-2)); color: #fff; border-color: transparent; }

/* ============ 页头 ============ */
.page-head { padding: 48px 0 10px; }
.crumbs { font-family: var(--mono); font-size: 12px; color: #94a3b8; margin-bottom: 16px; display: flex; flex-wrap: wrap; gap: 2px; }
.crumbs a:hover { color: var(--orange); }
.crumbs .cur { color: var(--ink-soft); }
.crumbs-light a, .crumbs-light span { color: #7f97a8; }
.page-title { font-size: 40px; font-weight: 800; line-height: 1.25; letter-spacing: 0.01em; }
.page-sub { color: var(--ink-soft); margin-top: 10px; max-width: 760px; }
.svc-detail-code { font-family: var(--mono); font-size: 12.5px; color: var(--orange); letter-spacing: 0.14em; margin-bottom: 8px; font-weight: 600; }
.detail-cover { margin-top: 28px; }
.detail-cover img { border-radius: var(--radius); box-shadow: var(--shadow); }

/* ============ 详情页 ============ */
.detail-article { padding: 36px 0 72px; }
.detail-grid { display: grid; grid-template-columns: 1fr 330px; gap: 44px; }
.blk-title { font-size: 22px; font-weight: 800; margin: 40px 0 16px; display: flex; align-items: center; gap: 12px; }
.blk-title::before { content: ""; width: 6px; height: 24px; border-radius: 3px; background: linear-gradient(180deg, var(--orange), var(--orange-2)); flex-shrink: 0; }
.detail-main > p { margin-bottom: 14px; color: var(--ink-2); font-size: 15.5px; }
.def-box {
  border: 1px solid rgba(255, 94, 0, 0.28); border-radius: var(--radius); background:
  linear-gradient(135deg, rgba(255, 94, 0, 0.05), var(--card) 60%);
  padding: 22px 24px; margin-top: 26px;
}
.def-box .blk-title { margin-top: 0; }
.def-box p { font-size: 15.5px; }
.pain-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pain-item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 20px 22px; transition: all 0.16s; }
.pain-item:hover { border-color: rgba(255, 94, 0, 0.35); box-shadow: var(--shadow); }
.pain-item h3 { font-size: 16px; margin-bottom: 6px; font-weight: 700; }
.pain-item p { font-size: 14px; color: var(--ink-soft); }
.process-list { list-style: none; }
.process-list li { display: flex; gap: 20px; padding: 16px 0; border-bottom: 1px dashed var(--line-2); }
.process-list h3 { font-size: 16.5px; margin-bottom: 4px; font-weight: 700; }
.process-list p { font-size: 14px; color: var(--ink-soft); }
.p-step { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--orange); min-width: 46px; line-height: 1.4; }
.deliv-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
.deliv-list li { padding: 10px 0 10px 28px; position: relative; font-size: 15px; border-bottom: 1px dashed var(--line); }
.deliv-list li::before { content: "✓"; position: absolute; left: 2px; color: var(--orange); font-weight: 700; }
.detail-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.detail-imgs img { border-radius: var(--radius-sm); border: 1px solid var(--line); }
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.fit-yes, .fit-no { padding: 22px 24px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); }
.fit-yes { border-top: 3px solid var(--ok); }
.fit-no { border-top: 3px solid var(--danger); }
.fit-grid h3 { font-family: var(--mono); font-size: 14px; letter-spacing: 0.12em; margin-bottom: 10px; font-weight: 700; }
.fit-yes h3 { color: var(--ok); }
.fit-no h3 { color: var(--danger); }
.fit-grid ul { list-style: none; }
.fit-grid li { padding: 7px 0; font-size: 14px; color: var(--ink-soft); border-bottom: 1px dashed var(--line); }
.faq-list details { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--card); margin-bottom: 10px; overflow: hidden; }
.faq-list summary {
  padding: 15px 20px; cursor: pointer; font-weight: 600; font-size: 15.5px; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 14px; transition: background 0.15s;
}
.faq-list summary:hover { background: var(--bg-soft); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; font-family: var(--mono); font-size: 20px; color: var(--orange); flex-shrink: 0; transition: transform 0.2s; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details[open] summary { border-bottom: 1px solid var(--line); }
.faq-list details > div, .faq-list details > p { padding: 15px 20px 17px; font-size: 14.5px; color: var(--ink-soft); }
.detail-cta {
  margin-top: 44px; border-radius: var(--radius); color: #e6edf6; padding: 30px 32px;
  background: radial-gradient(500px 200px at 95% 0%, rgba(255, 94, 0, 0.22), transparent 60%), var(--dark);
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.detail-cta p { font-size: 15px; }
.detail-side { position: sticky; top: 96px; align-self: start; display: flex; flex-direction: column; gap: 18px; }
.side-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 22px 24px; box-shadow: var(--shadow); }
.side-card h4 { font-size: 16.5px; font-weight: 700; padding-bottom: 11px; border-bottom: 2px solid transparent; border-image: linear-gradient(90deg, var(--orange), var(--orange-2)) 1; margin-bottom: 12px; }
.side-card dl { font-size: 13.5px; }
.side-card dt { color: #94a3b8; font-family: var(--mono); font-size: 11.5px; margin-top: 9px; }
.side-card dd { color: var(--ink); font-weight: 500; }
.side-sub { margin-top: 14px; }
.side-points { list-style: none; }
.side-points li { padding: 6px 0 6px 20px; font-size: 13.5px; position: relative; color: var(--ink-soft); }
.side-points li::before { content: ""; position: absolute; left: 4px; top: 14px; width: 7px; height: 7px; border-radius: 3px; background: linear-gradient(135deg, var(--orange), var(--orange-2)); }
.side-rel { list-style: none; }
.side-rel a { display: flex; align-items: center; gap: 10px; padding: 10px 0; font-size: 14px; border-bottom: 1px dashed var(--line); transition: color 0.15s; }
.side-rel a:hover { color: var(--orange); }
.side-rel a span { font-family: var(--mono); font-size: 11.5px; color: var(--orange); }
.side-rel a i { margin-left: auto; color: #cbd5e1; font-style: normal; transition: transform 0.15s; }
.side-rel a:hover i { color: var(--orange); transform: translateX(3px); }
.side-lecture { border: 1.5px dashed rgba(255, 94, 0, 0.5); border-radius: var(--radius); padding: 18px 20px; display: block; background: rgba(255, 94, 0, 0.03); transition: all 0.16s; }
.side-lecture:hover { background: rgba(255, 94, 0, 0.07); border-style: solid; }
.side-lecture b { color: var(--orange); display: block; font-size: 15px; margin-bottom: 4px; }
.side-lecture span { font-size: 12.5px; color: var(--ink-soft); }
.side-tip { font-size: 12.5px; color: #94a3b8; margin-top: 10px; }

/* ============ GEO 专题 ============ */
.geo-hero {
  background:
    radial-gradient(800px 400px at 85% 10%, rgba(255, 94, 0, 0.16), transparent 55%),
    radial-gradient(600px 300px at 5% 90%, rgba(37, 99, 235, 0.14), transparent 55%),
    var(--dark);
  color: #e6edf6; padding: 48px 0 68px;
}
.geo-hero-kicker { font-family: var(--mono); font-size: 13px; letter-spacing: 0.3em; color: var(--orange); margin: 18px 0 10px; font-weight: 600; }
.geo-hero h1 { font-size: 46px; line-height: 1.3; font-weight: 800; }
.geo-hero-sub { color: #9fb0c6; max-width: 640px; margin-top: 16px; font-size: 16px; }
.geo-hero-actions { display: flex; gap: 14px; margin-top: 30px; }
.geo-work-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.gw-item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 26px 22px; transition: all 0.18s; }
.gw-item:hover { border-color: rgba(255, 94, 0, 0.4); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.gw-no {
  font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--orange);
  background: rgba(255, 94, 0, 0.09); display: inline-block; padding: 2px 10px; border-radius: 6px;
}
.gw-item h3 { font-size: 18px; margin: 10px 0 8px; font-weight: 700; }
.gw-item p { font-size: 13.5px; color: var(--ink-soft); }
.compare-table { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; box-shadow: var(--shadow); }
.ct-row { display: grid; grid-template-columns: 130px 1fr 1fr; }
.ct-row > span, .ct-row > b { padding: 13px 18px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.ct-row > b { background: var(--bg-soft); font-weight: 700; }
.ct-head > span { background: var(--dark); color: #fff; font-weight: 700; letter-spacing: 0.04em; }
.ct-row:last-child > span { border-bottom: none; }
.ct-row > span:last-child { color: var(--blue); font-weight: 500; }

/* ============ 授课页 ============ */
.lecture-hero { padding: 44px 0 8px; }
.lecture-kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.26em; color: var(--orange); margin: 16px 0 10px; font-weight: 600; }
.lecture-hero h1 { font-size: 46px; line-height: 1.25; font-weight: 800; }
.lecture-sub { color: var(--ink-soft); margin-top: 14px; max-width: 680px; font-size: 16px; }
.lecture-rules { display: flex; gap: 0; margin-top: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); max-width: 660px; overflow: hidden; box-shadow: var(--shadow); }
.lecture-rules > div { flex: 1; padding: 18px 22px; border-right: 1px solid var(--line); }
.lecture-rules > div:last-child { border-right: none; }
.lecture-rules b { font-size: 26px; color: var(--orange); display: block; line-height: 1.2; font-weight: 800; }
.lecture-rules span { font-size: 12.5px; color: var(--ink-soft); font-family: var(--mono); }
.lecture-grid { display: grid; grid-template-columns: 1fr 400px; gap: 44px; align-items: start; }
.topic-item { display: flex; gap: 18px; padding: 20px 0; border-bottom: 1px dashed var(--line-2); }
.topic-item b { font-family: var(--mono); color: var(--orange); font-size: 14px; padding-top: 3px; font-weight: 700; }
.topic-item h3 { font-size: 17px; margin-bottom: 4px; font-weight: 700; }
.topic-item p { font-size: 14px; color: var(--ink-soft); }

/* ============ 授课照片轮播 ============ */
.photo-carousel { position: relative; }
.pc-track {
  display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 6px 4px 14px; scrollbar-width: thin; scrollbar-color: #cbd5e1 transparent;
}
.pc-track::-webkit-scrollbar { height: 6px; }
.pc-track::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
.pc-item {
  flex: 0 0 340px; scroll-snap-align: center; margin: 0;
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  background: var(--card); transition: all 0.18s;
}
.pc-item:hover { border-color: rgba(255, 94, 0, 0.45); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.pc-item img { width: 100%; height: 230px; object-fit: cover; }
.pc-item figcaption { padding: 10px 14px; font-size: 13px; color: var(--ink-soft); }
.pc-nav {
  position: absolute; top: 96px; transform: translateY(-50%); z-index: 5;
  width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line-2);
  background: #fff; color: var(--ink); font-size: 22px; line-height: 1; cursor: pointer;
  box-shadow: var(--shadow); transition: all 0.15s; display: flex; align-items: center; justify-content: center;
}
.pc-nav:hover { background: linear-gradient(135deg, var(--orange), var(--orange-2)); color: #fff; border-color: transparent; }
.pc-prev { left: -14px; }
.pc-next { right: -14px; }
@media (max-width: 720px) {
  .pc-item { flex: 0 0 78%; }
  .pc-nav { display: none; }
}

/* ============ 表单 ============ */
.lecture-form, .contact-form { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 30px 30px 26px; box-shadow: var(--shadow); }
.lecture-form h3 { font-size: 20px; font-weight: 800; margin-bottom: 20px; padding-bottom: 13px; border-bottom: 2px solid transparent; border-image: linear-gradient(90deg, var(--orange), var(--orange-2)) 1; }
.lecture-form label { display: block; font-size: 13.5px; color: var(--ink-2); margin-bottom: 14px; font-weight: 500; }
.lecture-form label i { color: var(--orange); font-style: normal; }
.lecture-form input, .lecture-form select, .lecture-form textarea {
  display: block; width: 100%; margin-top: 5px; padding: 11px 14px;
  border: 1px solid var(--line-2); border-radius: var(--radius-sm); background: var(--bg);
  font-size: 14.5px; font-family: var(--sans); color: var(--ink); transition: all 0.15s;
}
.lecture-form input:focus, .lecture-form select:focus, .lecture-form textarea:focus {
  outline: none; border-color: var(--orange); background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 94, 0, 0.12);
}
.lecture-form textarea { resize: vertical; }
.lecture-form button { width: 100%; margin-top: 6px; }
.form-note { font-size: 12px; color: #94a3b8; margin-top: 12px; }
.form-err { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; border-radius: var(--radius-sm); padding: 10px 14px; font-size: 13.5px; margin-bottom: 14px; }
.form-ok { border: 1px solid #a7f3d0; background: #ecfdf5; border-radius: var(--radius); padding: 34px; text-align: center; }
.form-ok b { font-size: 19px; color: #047857; display: block; margin-bottom: 10px; }
.form-ok p { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 18px; }
.hp-field { position: absolute; left: -9999px; opacity: 0; }
.form-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.contact-grid { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }

/* ============ CTA ============ */
.cta-final {
  background:
    radial-gradient(700px 300px at 80% 20%, rgba(255, 94, 0, 0.18), transparent 60%),
    var(--dark);
  color: #e6edf6; padding: 68px 0; text-align: center;
}
.cta-final h2 { font-size: 30px; margin-bottom: 12px; font-weight: 800; }
.cta-final p { color: #9fb0c6; max-width: 620px; margin: 0 auto 30px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-small { padding: 50px 0; }

/* ============ 页脚 ============ */
.site-footer {
  background:
    radial-gradient(600px 260px at 90% 0%, rgba(255, 94, 0, 0.08), transparent 60%),
    var(--dark);
  color: #94a3b8; padding: 60px 0 0; margin-top: 60px;
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--orange), var(--orange-2), transparent 70%) 1;
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 0.7fr 1.1fr; gap: 36px; }
.f-logo { display: flex; align-items: center; gap: 11px; margin-bottom: 15px; }
.f-logo img { border-radius: 8px; }
.f-logo b { font-size: 20px; color: #f8fafc; font-weight: 800; letter-spacing: 0.05em; }
.f-desc { font-size: 13.5px; color: #7d8fa5; margin-bottom: 10px; }
.f-col h4 { font-size: 15px; color: #e6edf6; margin-bottom: 15px; font-weight: 700; }
.f-col a { display: block; font-size: 13.5px; color: #7d8fa5; padding: 5px 0; transition: all 0.15s; }
.f-col a:hover { color: var(--orange-2); transform: translateX(3px); }
.f-contact p { font-size: 13px; color: #94a3b8; padding: 4px 0; display: flex; gap: 8px; }
.f-label { font-family: var(--mono); font-size: 11px; color: var(--orange-2); min-width: 38px; padding-top: 2px; }
.f-btn { display: inline-block !important; margin-top: 12px; border-radius: 999px; padding: 9px 20px !important; color: #fff !important; font-weight: 600; background: linear-gradient(135deg, var(--orange), var(--orange-2)); box-shadow: 0 6px 18px var(--orange-glow); }
.f-btn:hover { transform: translateY(-2px); color: #fff !important; }
.f-stamp { display: none; }
.f-mission { font-size: 13.5px; color: var(--orange-2); margin-top: 6px; font-weight: 600; letter-spacing: 0.04em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 14px; padding: 20px 24px 28px; border-top: 1px solid rgba(255, 255, 255, 0.08); margin-top: 44px; flex-wrap: wrap; }
.footer-bottom p { font-size: 12.5px; color: #5d7089; }
.f-geo-hint a, .footer-bottom a { color: #7d8fa5; }
.f-geo-hint a:hover, .footer-bottom a:hover { color: var(--orange-2); }

/* ============ 关于页 ============ */
.about-grid { display: grid; grid-template-columns: 1fr 320px; gap: 44px; align-items: start; }
.mission-inline { color: var(--orange); font-weight: 700; }
.about-toc { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.about-toc a { font-size: 13px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--ink-soft); background: var(--card); transition: all 0.15s; }
.about-toc a:hover { border-color: var(--orange); color: var(--orange); }
.about-block { scroll-margin-top: 90px; margin-bottom: 30px; padding: 26px 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); }
.about-block-content { font-size: 15px; color: var(--ink-2); }
.about-block-content h2 { font-size: 19px; font-weight: 700; margin: 18px 0 10px; }
.about-block-content h3 { font-size: 16.5px; font-weight: 700; margin: 14px 0 8px; }
.about-block-content p { margin-bottom: 12px; }
.about-block-content ul, .about-block-content ol { padding-left: 22px; margin: 8px 0; }
.about-block-content li { margin: 5px 0; }
.about-block-content img { border-radius: var(--radius-sm); margin: 10px 0; }
.rule-item { display: flex; gap: 22px; padding: 22px 0; border-bottom: 1px dashed var(--line-2); }
.r-no {
  font-size: 28px; font-weight: 800; line-height: 1.15; min-width: 48px;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.rule-item h3 { font-size: 19px; margin-bottom: 6px; font-weight: 700; }
.rule-item p { font-size: 14.5px; color: var(--ink-soft); }
.timeline { list-style: none; border-left: 2px solid var(--line-2); }
.timeline li { padding: 13px 0 13px 26px; position: relative; }
.timeline li::before { content: ""; position: absolute; left: -7px; top: 22px; width: 12px; height: 12px; border-radius: 5px; background: linear-gradient(135deg, var(--orange), var(--orange-2)); box-shadow: 0 0 0 4px rgba(255, 94, 0, 0.14); }
.timeline b { font-size: 16.5px; display: block; font-weight: 700; }
.timeline span { font-size: 14px; color: var(--ink-soft); }

/* ============ 文章页 ============ */
.news-article { padding-top: 28px; }
.article-head { padding: 20px 0 8px; max-width: 860px; }
.article-kicker { font-family: var(--mono); font-size: 12.5px; color: var(--orange); margin-bottom: 14px; font-weight: 600; }
.article-head h1 { font-size: 34px; line-height: 1.4; font-weight: 800; }
.article-summary { color: var(--ink-soft); margin-top: 14px; font-size: 16px; padding-left: 16px; border-left: 3px solid var(--orange); }
.article-tags { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.article-tags span { font-family: var(--mono); font-size: 12px; color: var(--blue); background: rgba(37, 99, 235, 0.07); padding: 2px 11px; border-radius: 999px; }
.article-cover { margin: 26px auto 10px; max-width: 860px; border-radius: var(--radius); box-shadow: var(--shadow); }
.article-content { max-width: 860px; margin: 26px auto 0; font-size: 16px; }
.article-content h2 { font-size: 23px; margin: 36px 0 14px; padding-left: 14px; border-left: 4px solid transparent; border-image: linear-gradient(180deg, var(--orange), var(--orange-2)) 1; font-weight: 800; }
.article-content h3 { font-size: 18px; margin: 22px 0 10px; font-weight: 700; }
.article-content p { margin-bottom: 16px; color: var(--ink-2); }
.article-content p.lead { font-size: 17.5px; color: var(--ink); font-weight: 500; }
.article-content .fact-box { border: 1px solid rgba(37, 99, 235, 0.25); border-radius: var(--radius); background: rgba(37, 99, 235, 0.04); padding: 20px 24px; margin: 26px 0; }
.article-content .fact-box h3 { margin-top: 0; color: var(--blue); font-family: var(--mono); font-size: 15px; letter-spacing: 0.08em; }
.article-content .fact-box ul { padding-left: 20px; }
.article-content .fact-box li { font-size: 14px; margin: 5px 0; color: var(--ink-soft); }
.article-content .editor-note { font-size: 13px; color: #94a3b8; border-top: 1px dashed var(--line-2); padding-top: 14px; margin-top: 30px; }
.article-foot { max-width: 860px; margin: 40px auto 0; }
.af-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding-top: 18px; flex-wrap: wrap; }
.af-nav a { font-size: 14px; color: var(--blue); }
.af-nav a:hover { color: var(--orange); }
.af-hot { margin-top: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 20px 22px; }
.af-hot h4 { font-size: 16px; margin-bottom: 10px; padding-bottom: 9px; font-weight: 700; border-bottom: 2px solid transparent; border-image: linear-gradient(90deg, var(--orange), var(--orange-2)) 1; }
.af-hot li { list-style: none; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.af-hot a:hover { color: var(--orange); }
.af-cta { margin-top: 22px; background: var(--bg-soft); border-left: 4px solid var(--orange); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 16px 20px; font-size: 14.5px; }
.af-cta a { color: var(--orange); font-weight: 600; }

/* ============ 404 ============ */
.notfound { text-align: center; padding: 100px 0; }
.nf-code {
  font-family: var(--mono); font-size: 92px; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, var(--orange), var(--orange-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.notfound h1 { font-size: 30px; margin: 18px 0 10px; font-weight: 800; }
.nf-sub { color: var(--ink-soft); }
.nf-sub a { color: var(--orange); font-weight: 600; }
.nf-err { margin-top: 16px; font-family: var(--mono); font-size: 12.5px; color: var(--danger); }

/* ============ 入场动效 ============ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.hero-copy, .hero-blueprint { animation: fadeUp 0.7s ease both; }
.hero-blueprint { animation-delay: 0.12s; }
.method-card, .gw-item, .case-card, .news-item { animation: fadeUp 0.55s ease both; }
.method-card:nth-child(2), .gw-item:nth-child(2) { animation-delay: 0.07s; }
.method-card:nth-child(3), .gw-item:nth-child(3) { animation-delay: 0.14s; }
.gw-item:nth-child(4) { animation-delay: 0.21s; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-grid, .geo-inner, .detail-grid, .lecture-grid, .about-grid, .contact-grid, .case-detail-grid { grid-template-columns: 1fr; }
  .hero-blueprint { max-width: 480px; }
  .detail-side { position: static; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .news-lead { grid-column: span 2; }
  .geo-work-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 44px; }
  .svc-table { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; padding: 12px 20px; box-shadow: var(--shadow); max-height: 70vh; overflow-y: auto; }
  .site-header.open .main-nav { display: flex; }
  .nav-drop-wrap { width: 100%; }
  .nav-drop-wrap > .drop-toggle { width: 100%; }
  .nav-drop { position: static; transform: none; opacity: 1; visibility: visible; min-width: 0; box-shadow: none; border: none; margin: 4px 0 8px; }
  .nav-drop-inner { grid-template-columns: 1fr; padding: 0 0 0 12px; max-height: none; }
  .drop-cols { min-width: 0; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
  .svc-row { grid-template-columns: 52px 1fr 28px; }
  .news-grid { grid-template-columns: 1fr; }
  .news-lead { grid-column: span 1; }
  .nr-cover { display: none; }
  .pain-list, .fit-grid, .detail-imgs, .form-2col, .geo-work-grid, .deliv-list { grid-template-columns: 1fr; }
  .compare-table .ct-row { grid-template-columns: 1fr; }
  .compare-table .ct-row > b { border-bottom: none; }
  .lecture-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 34px; }
  .geo-hero h1, .lecture-hero h1 { font-size: 32px; }
  .page-title { font-size: 30px; }
  .lecture-rules { flex-direction: column; }
  .lecture-rules > div { border-right: none; border-bottom: 1px solid var(--line); }
  .sec { padding: 50px 0; }
  .hero-facts > div { min-width: 45%; }
}