/* =========================================================
   易歪歪官网 · 全局样式
   结构：变量 / 基础 / 组件 / 页面 / 响应式
   ========================================================= */

:root {
  --bg: #FFFFFF;
  --soft: #FFF8F2;
  --soft-2: #FFEFE2;
  --ink: #12161F;
  --text: #26303F;
  --muted: #6C7889;
  --line: #F0E3D6;
  --primary: #FF5A1F;
  --primary-dark: #E0460D;
  --accent: #FFB020;
  --grad: linear-gradient(120deg, #FF5A1F 0%, #FFA928 100%);
  --radius: 20px;
  --radius-sm: 12px;
  --header-h: 74px;
  --shadow-sm: 0 4px 16px rgba(20, 24, 33, .06);
  --shadow: 0 18px 46px rgba(255, 90, 31, .14);
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { list-style: none; }

.container { width: min(1180px, 92%); margin: 0 auto; }

.section { padding: 96px 0; }
.section--soft { background: var(--soft); }

.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--soft-2);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.28;
  color: var(--ink);
  letter-spacing: -.02em;
  font-weight: 800;
}

.section-head p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 16.5px;
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  white-space: nowrap;
}

.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 12px 28px rgba(255, 90, 31, .32); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(255, 90, 31, .38); }

.btn--ghost { background: #fff; color: var(--ink); border: 1.5px solid var(--line); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

.btn--sm { height: 42px; padding: 0 20px; font-size: 14.5px; }
.btn--block { width: 100%; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, box-shadow .3s ease;
}

.site-header.scrolled { border-color: var(--line); box-shadow: 0 6px 24px rgba(18, 22, 31, .06); }

.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 38px; height: 38px; border-radius: 11px; box-shadow: 0 6px 16px rgba(255, 90, 31, .28); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 20px; font-weight: 800; color: var(--ink); letter-spacing: .02em; }
.brand-sub { font-size: 10px; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative;
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
  transition: color .2s ease, background .2s ease;
}
.main-nav a:hover { color: var(--primary); background: var(--soft); }
.main-nav a.active { color: var(--primary); font-weight: 700; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  transform: translateX(-50%);
  width: 18px; height: 3px;
  border-radius: 3px;
  background: var(--grad);
}

.nav-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .25s ease, opacity .25s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- 首屏 ---------------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 68px) 0 72px;
  background:
    radial-gradient(900px 520px at 82% 8%, rgba(255, 176, 32, .18), transparent 62%),
    radial-gradient(760px 460px at 8% 24%, rgba(255, 90, 31, .10), transparent 60%),
    linear-gradient(180deg, #FFFBF7 0%, #FFFFFF 78%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 90, 31, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 90, 31, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 60% 30%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 60% 30%, #000 0%, transparent 72%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px 7px 9px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  font-size: 13.5px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-badge i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
  font-size: 11.5px;
  font-style: normal;
  letter-spacing: .04em;
}

.hero h1 {
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.18;
  letter-spacing: -.03em;
  font-weight: 900;
  color: var(--ink);
}
.hero h1 em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  margin-top: 22px;
  font-size: 17.5px;
  color: var(--muted);
  max-width: 560px;
}
.hero-desc strong { color: var(--text); font-weight: 700; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 26px; font-size: 13.5px; color: var(--muted); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { flex-shrink: 0; }

.hero-visual { position: relative; }
.hero-image {
  border-radius: 26px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(255, 90, 31, .20), 0 2px 0 rgba(255, 255, 255, .6) inset;
  border: 6px solid #fff;
  transform: perspective(1200px) rotateY(-4deg);
}
.hero-image img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 12; }

.float-card {
  position: absolute;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 13px 16px;
  box-shadow: 0 16px 40px rgba(18, 22, 31, .12);
  display: flex;
  align-items: center;
  gap: 11px;
  animation: float 5s ease-in-out infinite;
}
.float-card b { display: block; font-size: 17px; color: var(--ink); line-height: 1.3; }
.float-card small { display: block; font-size: 11.5px; color: var(--muted); }
.float-card .dot { width: 34px; height: 34px; border-radius: 10px; background: var(--soft-2); display: grid; place-items: center; color: var(--primary); }

.float-card--tl { top: -20px; left: -26px; animation-delay: .4s; }
.float-card--br { right: -18px; bottom: -18px; animation-delay: 1.2s; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ---------------- 数据条 ---------------- */
.stats-band { background: var(--soft-2); border-block: 1px solid #FFE1CB; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 34px 0;
}
.stat-item { text-align: center; padding: 8px 18px; border-left: 1px solid #FFDCC2; }
.stat-item:first-child { border-left: 0; }
.stat-num { font-size: clamp(26px, 3vw, 38px); font-weight: 900; color: var(--primary); letter-spacing: -.02em; line-height: 1.2; }
.stat-num span { font-size: .55em; font-weight: 800; }
.stat-label { font-size: 13.5px; color: var(--muted); margin-top: 4px; }

/* ---------------- 场景 Tab ---------------- */
.tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 30px;
}
.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: #fff;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: all .25s ease;
}
.tab-btn .num { font-size: 12px; font-weight: 800; color: var(--accent); letter-spacing: .06em; }
.tab-btn:hover { border-color: #FFC7A8; color: var(--primary); }
.tab-btn.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.tab-btn.active .num { color: var(--accent); }

.tab-panels { position: relative; }
.tab-panel {
  display: none;
  grid-template-columns: 1.15fr .85fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.tab-panel.active { display: grid; animation: fadeUp .45s ease; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.tab-panel figure { padding: 0; }
.tab-panel figure img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 10; }

.panel-caption { padding: 42px 40px; display: flex; flex-direction: column; justify-content: center; }
.panel-caption h3 { font-size: 24px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.panel-caption p { margin-top: 12px; color: var(--muted); font-size: 15.5px; }
.panel-caption ul { margin-top: 20px; display: grid; gap: 9px; }
.panel-caption li { position: relative; padding-left: 22px; font-size: 14.5px; color: var(--text); }
.panel-caption li::before {
  content: "";
  position: absolute; left: 0; top: 9px;
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--grad);
}

/* ---------------- 下载卡 ---------------- */
.dl-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.dl-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.dl-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: #FFC7A8; }

.dl-card--hot { background: linear-gradient(180deg, #FFF7F0 0%, #FFFFFF 60%); border-color: #FFD0B4; }

.dl-flag {
  position: absolute; top: 18px; right: 18px;
  font-size: 11.5px; font-weight: 800; letter-spacing: .04em;
  color: #fff;
  background: var(--grad);
  padding: 4px 10px;
  border-radius: 999px;
}

.dl-icon {
  width: 54px; height: 54px;
  border-radius: 15px;
  display: grid; place-items: center;
  background: var(--soft-2);
  color: var(--primary);
  margin-bottom: 18px;
}
.dl-card h3 { font-size: 21px; font-weight: 800; color: var(--ink); }
.dl-ver { font-size: 12.5px; color: var(--muted); margin-top: 5px; letter-spacing: .02em; }
.dl-size { font-size: 13px; color: var(--primary); font-weight: 700; margin-top: 2px; }

.dl-links { margin: 18px 0 22px; display: grid; gap: 8px; }
.dl-links a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px;
  border-radius: 9px;
  background: var(--soft);
  font-size: 13.5px;
  color: var(--text);
  transition: background .2s ease, color .2s ease;
}
.dl-links a:hover { background: var(--soft-2); color: var(--primary); }
.dl-links a span:last-child { color: var(--muted); font-size: 12px; }

.dl-main { margin-top: auto; }

/* ---------------- 产品优势 ---------------- */
.adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.adv-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: stretch;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.adv-card img { width: 100%; height: 100%; object-fit: cover; min-height: 190px; }
.adv-body { padding: 28px 26px; }
.adv-body h3 { font-size: 19px; font-weight: 800; color: var(--ink); }
.adv-body p { margin-top: 8px; font-size: 14.5px; color: var(--muted); line-height: 1.7; }

/* ---------------- 用户反馈 ---------------- */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.stars { color: #FFAE1A; letter-spacing: 2px; font-size: 15px; }
.review-card p { color: var(--text); font-size: 15px; line-height: 1.8; }
.reviewer { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--grad); color: #fff;
  display: grid; place-items: center;
  font-weight: 800; font-size: 15px;
}
.reviewer b { display: block; font-size: 14.5px; color: var(--ink); }
.reviewer small { display: block; font-size: 12.5px; color: var(--muted); }

/* ---------------- 博客 ---------------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 36px; }
.filter-chip {
  padding: 9px 18px;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: #fff;
  font-size: 14px;
  color: var(--text);
  font-weight: 600;
  transition: all .22s ease;
}
.filter-chip:hover { border-color: #FFC7A8; color: var(--primary); }
.filter-chip.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

.blog-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease;
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.blog-cover { position: relative; overflow: hidden; }
.blog-cover img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .6s ease; }
.blog-card:hover .blog-cover img { transform: scale(1.06); }
.blog-cat {
  position: absolute; left: 14px; top: 14px;
  background: rgba(255, 255, 255, .94);
  color: var(--primary);
  font-size: 12px; font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.blog-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.blog-body h3 { font-size: 17.5px; line-height: 1.5; font-weight: 800; color: var(--ink); }
.blog-body p { font-size: 14px; color: var(--muted); }
.blog-meta { margin-top: auto; display: flex; gap: 14px; font-size: 12.5px; color: #9AA5B4; padding-top: 8px; }

/* ---------------- FAQ ---------------- */
.faq-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 40px; align-items: start; }

.faq-side { position: sticky; top: calc(var(--header-h) + 24px); }
.faq-side-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.faq-side-img img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.side-card {
  margin-top: 20px;
  background: var(--soft-2);
  border: 1px solid #FFDCC2;
  border-radius: var(--radius);
  padding: 24px;
}
.side-card h3 { font-size: 18px; font-weight: 800; color: var(--ink); }
.side-card p { font-size: 14px; color: var(--muted); margin: 8px 0 16px; }

.faq-group { margin-bottom: 34px; }
.faq-group:last-child { margin-bottom: 0; }
.faq-group-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 800; color: var(--ink);
  margin-bottom: 14px;
}
.faq-group-title::before {
  content: "";
  width: 6px; height: 20px; border-radius: 4px;
  background: var(--grad);
}

.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; margin-bottom: 12px; overflow: hidden; transition: border-color .25s ease, box-shadow .25s ease; }
.faq-item.open { border-color: #FFC7A8; box-shadow: var(--shadow-sm); }

.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px;
  text-align: left;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}
.faq-q i {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: grid; place-items: center;
  transition: transform .3s ease, border-color .3s ease, background .3s ease;
  font-style: normal;
  font-size: 15px;
  color: var(--primary);
  line-height: 1;
}
.faq-item.open .faq-q i { transform: rotate(45deg); background: var(--soft-2); border-color: #FFC7A8; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a p { padding: 0 22px 20px; font-size: 14.5px; color: var(--muted); line-height: 1.8; }

/* ---------------- CTA ---------------- */
.cta-banner {
  position: relative;
  border-radius: 28px;
  padding: 62px 56px;
  background: linear-gradient(120deg, #171B23 0%, #241A18 55%, #3A1D12 100%);
  color: #fff;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-banner::before {
  content: "";
  position: absolute;
  width: 520px; height: 520px;
  right: -90px; top: -190px;
  background: radial-gradient(circle, rgba(255, 90, 31, .55) 0%, transparent 68%);
  pointer-events: none;
}
.cta-banner::after {
  content: "";
  position: absolute;
  width: 380px; height: 380px;
  left: -120px; bottom: -220px;
  background: radial-gradient(circle, rgba(255, 176, 32, .28) 0%, transparent 70%);
  pointer-events: none;
}
.cta-copy { position: relative; z-index: 1; }
.cta-copy h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 900; line-height: 1.3; letter-spacing: -.02em; }
.cta-copy p { margin-top: 12px; color: rgba(255, 255, 255, .72); font-size: 16px; }
.cta-actions { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 12px; flex-shrink: 0; }
.cta-actions .btn--ghost { background: transparent; border-color: rgba(255, 255, 255, .28); color: #fff; }
.cta-actions .btn--ghost:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .08); }

/* ---------------- 页脚 ---------------- */
.site-footer { background: #12161F; color: #C9D2DF; padding: 72px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 42px; padding-bottom: 52px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand p { margin-top: 16px; font-size: 14px; color: #94A1B2; max-width: 300px; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 9px;
  background: rgba(255, 255, 255, .07);
  display: grid; place-items: center;
  font-size: 12px; color: #C9D2DF;
  transition: background .2s ease, color .2s ease;
}
.footer-social a:hover { background: var(--primary); color: #fff; }

.footer-col h4 { font-size: 14.5px; color: #fff; margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; font-size: 14px; color: #94A1B2; padding: 5px 0; transition: color .2s ease; }
.footer-col a:hover { color: var(--primary); }

.newsletter-form { display: flex; gap: 8px; margin-top: 14px; }
.newsletter-form input {
  flex: 1; min-width: 0;
  height: 44px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .06);
  color: #fff;
  padding: 0 14px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
.newsletter-form input::placeholder { color: #7C8899; }
.newsletter-form input:focus { border-color: var(--primary); }
.newsletter-form button { height: 44px; padding: 0 18px; border-radius: 10px; background: var(--grad); color: #fff; font-weight: 700; font-size: 14px; }
.form-tip { font-size: 12.5px; color: #94A1B2; margin-top: 10px; }
.form-tip.ok { color: #7BE0A3; }
.form-tip.err { color: #FF8B7A; }

.footer-col p.small { font-size: 13px; color: #94A1B2; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 22px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: #7C8899;
}
.footer-bottom nav { display: flex; gap: 18px; }
.footer-bottom a:hover { color: var(--primary); }

/* ---------------- 内页头部 ---------------- */
.page-hero {
  padding: calc(var(--header-h) + 64px) 0 56px;
  background:
    radial-gradient(760px 380px at 78% 0%, rgba(255, 176, 32, .16), transparent 68%),
    linear-gradient(180deg, #FFF9F4 0%, #FFFFFF 100%);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.page-hero h1 { font-size: clamp(30px, 3.8vw, 46px); font-weight: 900; color: var(--ink); letter-spacing: -.02em; }
.page-hero p { margin: 16px auto 0; max-width: 700px; color: var(--muted); font-size: 16.5px; }
.breadcrumb { display: flex; justify-content: center; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--primary); }

/* ---------------- 规格表 ---------------- */
.spec-table { width: 100%; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; border-collapse: separate; border-spacing: 0; background: #fff; }
.spec-table th, .spec-table td { padding: 16px 22px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 190px; background: var(--soft); color: var(--ink); font-weight: 700; }
.spec-table td { color: var(--muted); }

/* ---------------- 安装步骤 ---------------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px 26px;
}
.step-num {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: var(--grad);
  color: #fff;
  font-weight: 900;
  display: grid; place-items: center;
  font-size: 16px;
  margin-bottom: 16px;
}
.step h3 { font-size: 17px; font-weight: 800; color: var(--ink); }
.step p { margin-top: 8px; font-size: 14px; color: var(--muted); }

/* ---------------- 更新日志 ---------------- */
.changelog { display: grid; gap: 18px; }
.log-item {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 22px 26px;
}
.log-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 8px; }
.log-ver { font-size: 17px; font-weight: 800; color: var(--ink); }
.log-date { font-size: 12.5px; color: var(--muted); }
.log-tag { font-size: 11.5px; color: var(--primary); background: var(--soft-2); border-radius: 999px; padding: 3px 10px; font-weight: 700; }
.log-item p { font-size: 14px; color: var(--muted); }

/* ---------------- 关于页 ---------------- */
.about-hero-media { border-radius: 26px; overflow: hidden; box-shadow: var(--shadow); margin-top: 44px; }
.about-hero-media img { width: 100%; aspect-ratio: 21 / 9; object-fit: cover; }

.timeline { position: relative; display: grid; gap: 0; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), #FFD6BE);
}
.tl-item { position: relative; padding: 0 0 34px 22px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 6px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--primary);
  box-shadow: 0 0 0 4px var(--soft-2);
}
.tl-year { font-size: 14px; font-weight: 800; color: var(--primary); letter-spacing: .04em; }
.tl-item h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-top: 4px; }
.tl-item p { font-size: 14.5px; color: var(--muted); margin-top: 6px; max-width: 720px; }

.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.value-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-sm); }
.value-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  background: var(--soft-2);
  color: var(--primary);
  display: grid; place-items: center;
  margin-bottom: 16px;
}
.value-card h3 { font-size: 17.5px; font-weight: 800; color: var(--ink); }
.value-card p { margin-top: 8px; font-size: 14px; color: var(--muted); }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.team-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}
.team-avatar {
  width: 66px; height: 66px;
  margin: 0 auto 16px;
  border-radius: 20px;
  background: var(--grad);
  color: #fff;
  display: grid; place-items: center;
  font-size: 22px; font-weight: 900;
  letter-spacing: .02em;
}
.team-card h3 { font-size: 17px; font-weight: 800; color: var(--ink); }
.team-role { font-size: 12.5px; color: var(--primary); font-weight: 700; margin-top: 4px; }
.team-card p { margin-top: 10px; font-size: 13.5px; color: var(--muted); }

/* ---------------- 通用 ---------------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 46px; height: 46px;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 12px 28px rgba(18, 22, 31, .22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all .3s ease;
  z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--primary); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 720px; margin: 0 auto; }
  .hero-image { transform: none; }
  .float-card--tl { left: -8px; }
  .float-card--br { right: -8px; }
  .adv-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col--news { grid-column: 1 / -1; }
  .values-grid, .team-grid, .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 4vw 22px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(18, 22, 31, .08);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all .28s ease;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav a { padding: 13px 14px; font-size: 16px; }
  .main-nav a.active::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-actions .btn { display: none; }

  .dl-cards, .reviews-grid, .blog-grid { grid-template-columns: 1fr 1fr; }
  .tab-panel { grid-template-columns: 1fr; }
  .tab-panel figure img { aspect-ratio: 16 / 9; }
  .panel-caption { padding: 30px 26px 34px; }
  .faq-wrap { grid-template-columns: 1fr; }
  .faq-side { position: static; display: none; }
  .cta-banner { flex-direction: column; align-items: flex-start; padding: 44px 30px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(3) { border-left: 0; }
  .stat-item { padding: 14px 10px; }
  .stat-item:nth-child(-n+2) { border-bottom: 1px solid #FFDCC2; }
  .section { padding: 72px 0; }
  .adv-card { grid-template-columns: 1fr; }
  .adv-card img { aspect-ratio: 16 / 9; min-height: 0; }
}

@media (max-width: 640px) {
  .dl-cards, .reviews-grid, .blog-grid, .values-grid, .team-grid, .steps { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-brand { grid-column: 1 / -1; }
  .brand-sub { display: none; }
  .hero { padding-top: calc(var(--header-h) + 42px); }
  .hero-meta { gap: 8px 16px; font-size: 12.5px; }
  .float-card { padding: 10px 12px; }
  .float-card b { font-size: 14px; }
  .float-card small { font-size: 10.5px; }
  .float-card--tl { top: -12px; left: -6px; }
  .float-card--br { right: -6px; bottom: -12px; }
  .tab-btn { padding: 10px 15px; font-size: 14px; }
  .faq-q { font-size: 15px; padding: 16px 18px; }
  .faq-a p { padding: 0 18px 18px; }
  .spec-table th { width: 118px; padding: 13px 14px; font-size: 13.5px; }
  .spec-table td { padding: 13px 14px; font-size: 13.5px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}