/* ============================================================
   轻幂科技 2.0 · 设计规范（同步现站青绿色系）
   主色 Teal #0B9B9B ｜ 亮青 #0DD3D3 ｜ 深青黑 #053535
   浅青底 #F0FDFD ｜ 点缀橙 #F99C00 ｜ 文字 #171717
   ============================================================ */
:root {
  --navy: #053535;
  --navy-2: #0B4F4F;
  --blue: #0B9B9B;
  --blue-dark: #087070;
  --teal: #0DD3D3;
  --teal-soft: #7DF0E6;
  --amber: #F99C00;
  --violet: #0E5E5E;
  --ink: #171717;
  --ink-2: #4A5565;
  --muted: #6A7282;
  --bg: #F4FAFA;
  --bg-alt: #E8F4F4;
  --line: #E0ECEC;
  --white: #fff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(5, 53, 53, .06), 0 4px 14px rgba(5, 53, 53, .05);
  --shadow-md: 0 6px 24px rgba(5, 53, 53, .10);
  --shadow-lg: 0 16px 48px rgba(5, 53, 53, .16);
  --grad: linear-gradient(135deg, #0B9B9B 0%, #0DD3D3 100%);
  --container: 1160px;
  --ease: cubic-bezier(.22, .7, .3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}

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

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--navy); color: #fff; padding: 10px 18px;
  border-radius: 0 0 8px 0; z-index: 999;
}
.skip-link:focus { left: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 11px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 1.4;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s, color .25s, border-color .25s;
  will-change: transform;
}
.btn-lg { padding: 14px 34px; font-size: 16px; }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 20px rgba(11, 155, 155, .35); }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(11, 155, 155, .42); }
.btn-accent { background: var(--grad); color: #fff; box-shadow: 0 6px 20px rgba(0, 178, 170, .35); }
.btn-accent:hover { transform: translateY(-2px); filter: brightness(1.06); }
.btn-ghost { border: 1.5px solid var(--line); color: var(--ink); background: rgba(255,255,255,.75); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }
.btn-outline { border: 1.5px solid var(--blue); color: var(--blue); background: transparent; }
.btn-outline:hover { background: var(--blue); color: #fff; transform: translateY(-2px); }

/* ---------- 眉标 / 标题 ---------- */
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700;
  letter-spacing: .12em; color: var(--blue);
  background: rgba(11, 155, 155, .08); border: 1px solid rgba(11, 155, 155, .18);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 18px;
}
.eyebrow-light { color: #7FD9D9; background: rgba(125, 240, 230, .12); border-color: rgba(125, 240, 230, .25); }
.section { padding: 70px 0; }
.section-alt { background: var(--bg); }
.section-dark { background: linear-gradient(160deg, #053535 0%, #0A4D4D 70%, #0B5F5F 100%); color: #E7EEFB; }
.section-head { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.3; font-weight: 700; letter-spacing: .01em; }
.section-sub { margin-top: 16px; color: var(--muted); font-size: 16px; }
.section-dark .section-sub { color: #86B8B8; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s, border-color .3s, background .3s;
}
.site-header.scrolled { border-color: var(--line); box-shadow: 0 4px 24px rgba(11, 31, 63, .07); background: rgba(255,255,255,.95); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 34px; height: 34px; flex: none; object-fit: contain; }
.brand-name { font-size: 18px; font-weight: 800; color: var(--navy); display: flex; flex-direction: column; line-height: 1.15; }
.brand-name em { font-style: normal; font-size: 9.5px; font-weight: 600; letter-spacing: .22em; color: var(--muted); }
.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav > a { font-size: 15px; font-weight: 500; color: var(--ink-2); position: relative; padding: 6px 0; }
.main-nav > a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--grad); border-radius: 2px; transition: width .3s var(--ease);
}
.main-nav > a:not(.nav-cta):hover { color: var(--navy); }
.main-nav > a:not(.nav-cta):hover::after { width: 100%; }
.main-nav > a.active { color: var(--blue); }
.main-nav > a.active::after { width: 100%; }
.nav-cta { padding: 9px 22px; font-size: 14px; }
.nav-console { padding: 9px 20px; font-size: 14px; border: none; background: rgba(255,255,255,.78); color: var(--ink); }
.nav-console:hover { background: #fff; color: var(--blue); transform: translateY(-2px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero { position: relative; padding: 168px 0 0; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 460px at 82% 8%, rgba(11, 155, 155, .12), transparent 62%),
    radial-gradient(700px 420px at 8% 90%, rgba(13, 211, 211, .09), transparent 60%),
    linear-gradient(180deg, #F6FBFA 0%, #FFFFFF 78%);
}
.hero-bg::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(11, 155, 155, .10) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(720px 380px at 70% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(720px 380px at 70% 30%, #000 30%, transparent 75%);
}
.hero-grid { max-width: 920px; margin: 0 auto; text-align: center; }
.hero-copy { display: flex; flex-direction: column; align-items: center; }
.hero-copy h1 {
  font-size: clamp(36px, 5vw, 56px); line-height: 1.2; font-weight: 800;
  color: var(--navy); letter-spacing: .01em; margin: 4px 0 22px;
}
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: 17px; color: var(--ink-2); max-width: 660px; margin: 0 auto; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; margin: 32px 0 26px; flex-wrap: wrap; justify-content: center; }
.hero-trust { display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; }
.hero-trust li { position: relative; padding-left: 24px; font-size: 14px; color: var(--muted); }
.hero-trust li::before {
  content: ""; position: absolute; left: 0; top: 5px; width: 14px; height: 14px;
  border-radius: 50%; background: rgba(13, 211, 211, .15);
}
.hero-trust li::after {
  content: ""; position: absolute; left: 4px; top: 9px; width: 6px; height: 3.5px;
  border-left: 2px solid var(--teal); border-bottom: 2px solid var(--teal);
  transform: rotate(-45deg);
}
.hero-art { display: flex; align-items: center; justify-content: center; min-height: 0; }
.hero-art svg { width: 100%; height: auto; max-height: 440px; }

/* 数据带 */
.stats-band { margin-top: 84px; background: var(--navy); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 34px 20px; text-align: center; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 26%; height: 48%; width: 1px; background: rgba(255,255,255,.12); }
.stat strong { display: block; font-size: clamp(26px, 3vw, 36px); font-weight: 800; background: linear-gradient(120deg, #43D9D9, #9BF5EC); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { display: block; margin-top: 8px; font-size: 13px; color: #86B8B8; line-height: 1.6; }

/* ---------- 工作台大图入口 ---------- */
.console-banner { position: relative; padding: 64px 0; overflow: hidden; background: #053535; }
.console-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(680px 340px at 28% 35%, rgba(13, 211, 211, .22), transparent 60%),
    radial-gradient(560px 300px at 78% 65%, rgba(11, 155, 155, .18), transparent 55%);
}
.console-bg::before { content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(13, 211, 211, .12) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(760px 400px at 50% 50%, #000 15%, transparent 72%);
  -webkit-mask-image: radial-gradient(760px 400px at 50% 50%, #000 15%, transparent 72%);
}
.console-network { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .5; }
.console-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 26px; }
.console-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .28em; color: #0DD3D3; margin: 0; }
.console-title { font-size: clamp(30px, 4.6vw, 48px); font-weight: 800; line-height: 1.16; color: #fff; margin: 10px 0 0; letter-spacing: .01em; }
.console-en { display: block; margin-top: 6px; font-size: clamp(22px, 3.4vw, 38px); font-weight: 700; letter-spacing: .02em;
  background: linear-gradient(120deg, #0DD3D3 0%, #7DF0E6 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.console-desc { font-size: 15px; color: #9BD8D8; max-width: 560px; margin: 14px 0 0; line-height: 1.8; }
.console-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
.console-tag { font-size: 12.5px; font-weight: 600; color: #7DF0E6; padding: 6px 16px; border: 1px solid rgba(13, 211, 211, .3); border-radius: 999px; background: rgba(13, 211, 211, .06); }
.console-cta { display: inline-flex; flex-direction: column; align-items: center; gap: 2px; padding: 16px 52px; border-radius: 999px;
  background: #0DD3D3; color: #053535; text-decoration: none; font-weight: 700;
  box-shadow: 0 8px 28px rgba(13, 211, 211, .42);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.console-cta:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(13, 211, 211, .58); }
.console-cta-en { font-size: 17px; font-weight: 800; letter-spacing: .02em; }
.console-cta-cn { font-size: 12px; font-weight: 500; opacity: .65; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.case-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 32px; box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.case-tag {
  align-self: flex-start; font-size: 12.5px; font-weight: 700; letter-spacing: .04em;
  color: var(--blue); background: rgba(11, 155, 155, .09); border-radius: 999px; padding: 4px 14px;
}
.case-tag-teal { color: #0E9086; background: rgba(13, 211, 211, .1); }
.case-card h3 { margin: 18px 0 12px; font-size: 22px; color: var(--navy); font-weight: 700; }
.case-card > p { color: var(--ink-2); font-size: 15px; }
.case-points { margin-top: 20px; display: grid; gap: 10px; }
.case-points li { position: relative; padding-left: 24px; font-size: 14.5px; color: var(--ink-2); }
.case-points li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 14px; height: 8px;
  border-left: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: rotate(-45deg);
}
.case-note { margin-top: auto; padding-top: 18px; font-size: 12.5px; color: var(--muted); }
.case-cta {
  margin-top: 36px; text-align: center; display: flex; flex-direction: column;
  align-items: center; gap: 16px; padding: 28px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(46,107,255,.06), rgba(0,194,184,.07));
  border: 1px dashed rgba(11, 155, 155, .3);
}
.case-cta p { color: var(--ink-2); font-weight: 500; }

/* ---------- 工坊卡片 ---------- */
.workshop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.workshop-card {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 26px;
  display: flex; flex-direction: column;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.workshop-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(11, 155, 155, .45); }
.wk-vis { margin: -30px -26px 22px; position: relative; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden; }
.wk-vis img { width: 100%; height: 168px; object-fit: cover; display: block; }
.wk-vis::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 40px;
  background: linear-gradient(180deg, transparent, #fff);
  pointer-events: none;
}
.wk-icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: rgba(11, 155, 155, .1); color: var(--blue); margin-bottom: 18px;
}
.wk-icon svg { width: 25px; height: 25px; }
.wk-icon-teal { background: rgba(13, 211, 211, .1); color: #0E9086; }
.wk-icon-amber { background: rgba(249, 156, 0, .14); color: #C77C00; }
.wk-icon-violet { background: rgba(14, 94, 94, .1); color: var(--violet); }
.wk-badge {
  display: inline-block; align-self: flex-start; font-size: 11.5px; font-weight: 700;
  color: var(--muted); letter-spacing: .08em; margin-bottom: 10px;
}
.workshop-card h3 { font-size: 19px; color: var(--navy); font-weight: 700; }
.wk-price { margin: 6px 0 12px; font-size: 14px; font-weight: 700; color: var(--blue); }
.wk-desc { font-size: 14px; color: var(--ink-2); }
.wk-list { margin: 18px 0 22px; display: grid; gap: 8px; }
.wk-list li { position: relative; padding-left: 18px; font-size: 13.5px; color: var(--ink-2); }
.wk-list li::before { content: ""; position: absolute; left: 0; top: 10px; width: 7px; height: 7px; border-radius: 2px; background: var(--grad); }
.wk-btn { margin-top: auto; align-self: stretch; padding: 9px 16px; font-size: 14px; }
.wk-console { display: inline-flex; align-items: center; justify-content: center; margin-top: 12px; font-size: 13.5px; font-weight: 600; color: var(--blue); text-decoration: none; transition: color .2s, transform .2s; }
.wk-console:hover { color: var(--navy); transform: translateX(2px); }

/* ---------- 流程 ---------- */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.process-step {
  position: relative; background: var(--white); border-radius: var(--radius);
  border: 1px solid var(--line); padding: 30px 26px; overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.process-step:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.step-num {
  display: inline-block; font-size: 44px; font-weight: 800; line-height: 1;
  background: linear-gradient(180deg, rgba(46,107,255,.28), rgba(46,107,255,.04));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.process-step h3 { margin: 14px 0 8px; font-size: 18px; color: var(--navy); }
.process-step p { font-size: 14px; color: var(--ink-2); }
.process-step::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 4px; width: 100%;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.process-step:hover::after { transform: scaleX(1); }

/* ---------- 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv-card {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius); padding: 30px 28px;
  transition: background .3s, transform .3s var(--ease), border-color .3s;
}
.adv-card:hover { background: rgba(255, 255, 255, .09); border-color: rgba(125, 240, 230, .4); transform: translateY(-4px); }
.adv-card h3 { font-size: 17.5px; color: #fff; margin-bottom: 10px; padding-left: 30px; position: relative; font-weight: 700; }
.adv-card h3::before {
  content: ""; position: absolute; left: 0; top: 5px; width: 18px; height: 18px; border-radius: 5px;
  background: var(--grad); opacity: .9;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
.adv-card p { font-size: 14.5px; color: #9CC6C6; }

/* ---------- 价格 ---------- */
.pricing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; max-width: 900px; margin: 0 auto; }
.price-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  padding: 40px 36px; display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.price-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.price-card-featured {
  border: 2px solid var(--blue); position: relative;
  background: linear-gradient(180deg, #FFFFFF 0%, #F4FBFB 100%);
}
.price-flag {
  position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; font-size: 12.5px; font-weight: 700;
  padding: 5px 18px; border-radius: 999px; white-space: nowrap; letter-spacing: .05em;
}
.price-card h3 { font-size: 24px; color: var(--navy); font-weight: 800; }
.price-tag { color: var(--muted); font-size: 14px; margin: 6px 0 24px; }
.price-list { display: grid; gap: 0; margin-bottom: 22px; }
.price-list li {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 13px 0; border-bottom: 1px dashed var(--line); font-size: 15px; color: var(--ink-2);
}
.price-list strong { color: var(--navy); font-size: 16px; white-space: nowrap; }
.price-note { font-size: 13.5px; color: var(--muted); margin-bottom: 24px; }
.price-btn { margin-top: auto; align-self: stretch; }

/* ---------- FAQ ---------- */
.faq-container { max-width: 820px; }
.faq-list { display: grid; gap: 14px; }
.faq-item {
  background: var(--white); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; transition: border-color .3s, box-shadow .3s;
}
.faq-item[open] { border-color: rgba(11, 155, 155, .45); box-shadow: var(--shadow-sm); }
.faq-item summary {
  list-style: none; display: flex; align-items: center; justify-content: space-between;
  gap: 18px; padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--navy);
  cursor: pointer; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  flex: none; width: 26px; height: 26px; border-radius: 50%; position: relative;
  background: rgba(11, 155, 155, .1); transition: background .3s, transform .3s var(--ease);
}
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--blue);
  transform: translate(-50%, -50%); border-radius: 2px; transition: transform .3s var(--ease);
}
.faq-icon::before { width: 11px; height: 2px; }
.faq-icon::after { width: 2px; height: 11px; }
.faq-item[open] .faq-icon { background: var(--blue); }
.faq-item[open] .faq-icon::before { background: #fff; }
.faq-item[open] .faq-icon::after { background: #fff; transform: translate(-50%, -50%) scaleY(0); }
.faq-body { padding: 0 24px 22px; color: var(--ink-2); font-size: 15px; }

/* ---------- 联系 ---------- */
.contact-section {
  background:
    radial-gradient(640px 320px at 88% 10%, rgba(13, 211, 211, .16), transparent 60%),
    linear-gradient(150deg, #053535 0%, #0B5757 100%);
  color: #E7EEFB;
}
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.contact-copy h2 { font-size: clamp(26px, 3.4vw, 36px); line-height: 1.3; color: #fff; font-weight: 700; margin: 4px 0 18px; }
.contact-copy > p { color: #9CC6C6; font-size: 16px; max-width: 480px; }
.contact-points { margin-top: 26px; display: grid; gap: 12px; }
.contact-points li { position: relative; padding-left: 26px; color: #C5E9E9; font-size: 15px; }
.contact-points li::before {
  content: ""; position: absolute; left: 0; top: 5px; width: 15px; height: 15px; border-radius: 50%;
  background: rgba(13, 211, 211, .18);
}
.contact-points li::after {
  content: ""; position: absolute; left: 4.5px; top: 9.5px; width: 6px; height: 3.5px;
  border-left: 2px solid #7DF0E6; border-bottom: 2px solid #7DF0E6; transform: rotate(-45deg);
}
.contact-card {
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 20px; padding: 36px 32px; text-align: center; backdrop-filter: blur(8px);
}
.contact-card h3 { color: #fff; font-size: 19px; font-weight: 700; margin-bottom: 22px; }
.qr-slot {
  margin: 0 auto; border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #86B8B8; transition: transform .3s, box-shadow .3s;
}
.qr-slot svg { width: 52px; height: 52px; color: #5E9494; }
.qr-slot span { font-size: 12.5px; }
.qr-img { display: block; width: 260px; height: auto; max-height: 360px; object-fit: contain; border-radius: 16px; }
.qr-img:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(13, 211, 211, .22); }
.contact-note { margin-top: 18px; font-size: 13px; color: #86B8B8; }

/* ---------- 页脚 ---------- */
.site-footer { background: #042B2B; color: #86B8B8; padding: 56px 0 30px; }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-mark { width: 44px; height: 44px; object-fit: contain; }
.footer-slogan { font-size: 14px; line-height: 1.8; }
.footer-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-nav a { font-size: 14px; color: #86B8B8; transition: color .25s; }
.footer-nav a:hover { color: #fff; }
.footer-bottom { margin-top: 34px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .08); }
.footer-bottom p { font-size: 13px; color: #5E9494; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--navy); color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .3s, transform .3s var(--ease), visibility .3s, background .3s;
}
.back-top svg { width: 20px; height: 20px; }
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--blue); }

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .12s; }
.delay-2 { transition-delay: .24s; }
.delay-3 { transition-delay: .36s; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .workshop-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-art { max-width: 560px; margin: 0 auto; }
  .hero { padding-top: 140px; }
}

@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .hero { padding-top: 120px; }
  .hero-sub { font-size: 16px; }
  .stats-band { margin-top: 60px; }
  .console-banner { padding: 48px 0; }
  .console-inner { gap: 22px; }
  .console-cta { padding: 14px 40px; }
  .console-cta-en { font-size: 15px; }
  .console-tags { gap: 8px; }
  .console-tag { font-size: 11.5px; padding: 5px 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 24px 14px; }
  .stat:nth-child(3)::before { display: none; }
  .case-grid, .pricing-grid, .contact-grid { grid-template-columns: 1fr; }
  .contact-grid { gap: 36px; }
  .workshop-grid, .process-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 40px; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    background: #fff; padding: 18px 24px 26px; gap: 4px;
    border-bottom: 1px solid var(--line); box-shadow: 0 24px 40px rgba(11, 31, 63, .12);
    transform: translateY(-12px); opacity: 0; visibility: hidden; pointer-events: none;
    transition: transform .3s var(--ease), opacity .3s, visibility .3s;
  }
  .main-nav.open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .main-nav > a { padding: 13px 6px; border-bottom: 1px solid var(--bg-alt); font-size: 15.5px; }
  .main-nav > a::after { display: none; }
  .nav-cta { margin-top: 14px; justify-content: center; border-bottom: none !important; }
  .nav-console { margin-top: 8px; justify-content: center; border-bottom: none !important; }

  .footer-grid { flex-direction: column; }
  .faq-item summary { font-size: 15px; padding: 17px 18px; }
  .faq-body { padding: 0 18px 18px; }
  .back-top { right: 16px; bottom: 16px; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-actions .btn { flex: 1; }
  .case-card, .price-card { padding: 28px 22px; }
  .stat strong { font-size: 24px; }
  .hero-trust { gap: 12px; }
  .hero-trust li { font-size: 13px; }
}

/* ============================================================
   V4.1 新增组件 · 人群分流 / 检测钩子 / 三档订阅 / 加购 / 子页
   ============================================================ */

/* ---------- 人群分流 ---------- */
.seg-section { background: var(--bg); }
.seg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.seg-card {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: 20px; padding: 34px 30px; display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.seg-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(11, 155, 155, .45); }
.seg-card.hot { border: 2px solid var(--blue); }
.seg-card h3 { font-size: 20px; color: var(--navy); font-weight: 800; }
.seg-tag {
  align-self: flex-start; font-size: 11.5px; font-weight: 700; letter-spacing: .06em;
  color: var(--blue); background: rgba(11, 155, 155, .09); border-radius: 999px; padding: 3px 12px; margin-bottom: 14px;
}
.seg-price { font-size: 26px; font-weight: 800; color: var(--navy); margin: 10px 0 2px; }
.seg-price small { font-size: 13px; font-weight: 400; color: var(--muted); }
.seg-desc { font-size: 14.5px; color: var(--ink-2); margin: 8px 0 16px; }
.seg-desc b { color: var(--navy); }
.seg-list { display: grid; gap: 9px; margin-bottom: 22px; }
.seg-list li { position: relative; padding-left: 22px; font-size: 14px; color: var(--ink-2); }
.seg-list li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 13px; height: 7px;
  border-left: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: rotate(-45deg);
}
.seg-btn { margin-top: auto; align-self: stretch; }

/* ---------- 检测钩子 ---------- */
.hook-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.hook-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  padding: 36px 32px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.hook-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.hook-label { font-size: 12px; font-weight: 700; letter-spacing: .14em; color: var(--blue); margin-bottom: 12px; }
.hook-card h3 { font-size: 23px; color: var(--navy); font-weight: 800; line-height: 1.35; }
.hook-card > p { font-size: 15px; color: var(--ink-2); margin: 12px 0 22px; }
.hook-form {
  display: flex; gap: 10px; flex-wrap: wrap; margin-top: auto;
}
.hook-input {
  flex: 1 1 180px; padding: 12px 16px; border: 1.5px solid var(--line); border-radius: 12px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: var(--white);
  transition: border-color .25s, box-shadow .25s;
}
.hook-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11, 155, 155, .12); }
.hook-btn { padding: 12px 22px; font-size: 14.5px; white-space: nowrap; }
.hook-note { font-size: 12.5px; color: var(--muted); margin-top: 12px; }

/* ---------- 服务模块（四大模块） ---------- */
.mod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.mod-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.mod-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(11, 155, 155, .4); }
.mod-badge {
  align-self: flex-start; font-size: 11px; font-weight: 700; letter-spacing: .1em;
  color: var(--muted); margin-bottom: 12px;
}
.mod-card h3 { font-size: 19px; color: var(--navy); font-weight: 800; margin-bottom: 14px; }
.mod-list { display: grid; gap: 9px; margin-bottom: 20px; }
.mod-list li { position: relative; padding-left: 20px; font-size: 14px; color: var(--ink-2); }
.mod-list li::before {
  content: ""; position: absolute; left: 1px; top: 10px; width: 8px; height: 8px;
  border-radius: 2px; background: var(--grad);
}
.mod-btn { margin-top: auto; align-self: flex-start; padding: 8px 20px; font-size: 13.5px; }

/* ---------- 三档订阅 ---------- */
.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.tier-card {
  position: relative; background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  padding: 38px 32px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.tier-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.tier-card.featured {
  border: 2px solid var(--blue);
  background: linear-gradient(180deg, #FFFFFF 0%, #F4FBFB 100%);
}
.tier-flag {
  position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; font-size: 12.5px; font-weight: 700;
  padding: 5px 18px; border-radius: 999px; white-space: nowrap; letter-spacing: .04em;
}
.tier-card h3 { font-size: 22px; color: var(--navy); font-weight: 800; }
.tier-price { font-size: 34px; font-weight: 800; color: var(--navy); margin: 10px 0 4px; line-height: 1.1; }
.tier-price small { font-size: 14px; font-weight: 400; color: var(--muted); }
.tier-tag { font-size: 13.5px; color: var(--muted); margin-bottom: 20px; }
.tier-list { display: grid; gap: 11px; margin-bottom: 26px; flex: 1; }
.tier-list li { position: relative; padding-left: 22px; font-size: 14.5px; color: var(--ink-2); }
.tier-list li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 13px; height: 7px;
  border-left: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: rotate(-45deg);
}
.tier-btn { margin-top: auto; align-self: stretch; }

/* ---------- 加购表 / 定制 ---------- */
.addon-table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 18px 0 8px; }
.addon-table th { background: var(--bg-alt); color: var(--navy); font-weight: 700; padding: 12px 16px; text-align: left; border: 1px solid var(--line); font-size: 13.5px; }
.addon-table td { padding: 13px 16px; border: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
.addon-table td:first-child { font-weight: 600; color: var(--navy); }
.addon-table .hot-row { background: #F4FBFB; }
.addon-lock { font-size: 11px; background: #EEE7DB; color: #8A6D3B; border-radius: 4px; padding: 1px 7px; font-weight: 700; white-space: nowrap; }
.custom-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.custom-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  padding: 32px 30px; box-shadow: var(--shadow-sm);
}
.custom-card h3 { font-size: 19px; color: var(--navy); font-weight: 800; margin-bottom: 14px; }
.custom-card .price { font-size: 26px; font-weight: 800; color: var(--navy); margin: 6px 0 14px; }
.custom-card .price small { font-size: 13px; font-weight: 400; color: var(--muted); }
.custom-list { display: grid; gap: 9px; }
.custom-list li { position: relative; padding-left: 22px; font-size: 14.5px; color: var(--ink-2); }
.custom-list li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 13px; height: 7px;
  border-left: 2.5px solid var(--teal); border-bottom: 2.5px solid var(--teal);
  transform: rotate(-45deg);
}
.custom-list b { color: var(--navy); }

/* ---------- 子页通用 ---------- */
.sub-hero { position: relative; padding: 148px 0 64px; overflow: hidden; background: linear-gradient(180deg, #F6FBFA 0%, #FFFFFF 80%); }
.sub-hero-bg { position: absolute; inset: 0; z-index: -1; background: radial-gradient(700px 380px at 80% 10%, rgba(11, 155, 155, .12), transparent 62%), radial-gradient(560px 320px at 10% 90%, rgba(13, 211, 211, .09), transparent 60%); }
.sub-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; color: var(--navy); line-height: 1.25; margin: 6px 0 18px; }
.sub-hero p { font-size: 17px; color: var(--ink-2); max-width: 620px; }
.sub-hero .eyebrow { margin-bottom: 14px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--blue); }
.breadcrumb a:hover { color: var(--navy); }
.page-section { padding: 76px 0; }
.page-section-alt { background: var(--bg); }

/* ---------- 检测页表单 ---------- */
.detect-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 20px;
  padding: 40px 36px; box-shadow: var(--shadow-md); max-width: 640px; margin: 0 auto;
}
.detect-card h2 { font-size: 24px; color: var(--navy); font-weight: 800; margin-bottom: 8px; }
.detect-card > p { color: var(--ink-2); font-size: 15px; margin-bottom: 26px; }
.detect-form { display: grid; gap: 18px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 700; color: var(--navy); margin-bottom: 7px; }
.form-field input, .form-field select {
  width: 100%; padding: 13px 16px; border: 1.5px solid var(--line); border-radius: 12px;
  font-size: 15px; font-family: inherit; color: var(--ink); background: var(--white);
  transition: border-color .25s, box-shadow .25s;
}
.form-field input:focus, .form-field select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11, 155, 155, .12); }
.form-field .hint { font-size: 12px; color: var(--muted); margin-top: 6px; }
.detect-cta { width: 100%; padding: 15px; font-size: 16px; margin-top: 6px; }
.detect-privacy { font-size: 12px; color: var(--muted); text-align: center; margin-top: 14px; }
.btn-sm { padding: 7px 18px; font-size: 13px; }

/* ---------- GEO检测 · 等待与报告 ---------- */
.geo-loading {
  text-align: center; padding: 46px 20px 40px; color: var(--ink-2);
}
.geo-spinner {
  width: 46px; height: 46px; margin: 0 auto 20px; border-radius: 50%;
  border: 4px solid var(--bg-alt); border-top-color: var(--blue);
  animation: geoSpin .9s linear infinite;
}
@keyframes geoSpin { to { transform: rotate(360deg); } }
.geo-loading-msg { font-size: 17px; font-weight: 700; color: var(--navy); }
.geo-loading-hint { font-size: 13px; color: var(--muted); margin-top: 10px; }

.geo-result { margin-top: 6px; }
.geo-result-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border: 1px solid var(--line); border-radius: 14px 14px 0 0;
  background: var(--bg); color: var(--navy);
}
.geo-result-bar strong { font-size: 15px; }

.geo-md {
  border: 1px solid var(--line); border-top: none; border-radius: 0 0 14px 14px;
  padding: 26px 26px 30px; background: var(--white);
}
.geo-md .geo-h { color: var(--navy); font-size: 20px; font-weight: 800; margin: 24px 0 12px; line-height: 1.4; }
.geo-md .geo-h:first-child { margin-top: 0; }
.geo-md .geo-h + .geo-h { margin-top: 8px; }
.geo-md h3.geo-h, .geo-md h4.geo-h { font-size: 17px; }
.geo-md p { color: var(--ink-2); font-size: 14.5px; margin: 10px 0; line-height: 1.8; }
.geo-md strong { color: var(--navy); font-weight: 700; }
.geo-md code {
  background: var(--bg); border: 1px solid var(--line); border-radius: 6px;
  padding: 1px 7px; font-size: 13px; color: var(--blue-dark); font-family: "SF Mono", Menlo, Consolas, monospace;
}
.geo-md a { color: var(--blue); border-bottom: 1px dashed var(--blue); }
.geo-md a:hover { color: var(--navy); border-bottom-style: solid; }
.geo-md .geo-quote {
  border-left: 3px solid var(--teal); background: var(--bg);
  padding: 10px 14px; border-radius: 0 10px 10px 0; color: var(--ink-2); font-size: 14px;
}
.geo-md .geo-li { margin: 6px 0 6px 4px; padding-left: 4px; }
.geo-md .geo-num { color: var(--blue); font-weight: 700; margin-right: 2px; }
.geo-md .geo-hr { border: none; border-top: 1px solid var(--line); margin: 22px 0; }
.geo-table-wrap { overflow-x: auto; margin: 14px 0; }
.geo-md table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 480px; }
.geo-md th, .geo-md td {
  border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; line-height: 1.6;
}
.geo-md th { background: var(--bg); color: var(--navy); font-weight: 700; white-space: nowrap; }
.geo-md tr:nth-child(even) td { background: var(--bg); }

.geo-error { border: 1px solid #F3C1C1; background: #FEF6F6; border-radius: 14px; padding: 26px; text-align: center; }
.geo-error p { color: #8A3B3B; font-size: 14.5px; margin-bottom: 18px; }

/* ---------- 语义 dl 数据带 ---------- */
.stats-dl { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats-dl > div { padding: 34px 20px; text-align: center; position: relative; }
.stats-dl > div + div::before { content: ""; position: absolute; left: 0; top: 26%; height: 48%; width: 1px; background: rgba(255,255,255,.12); }
.stats-dl dt {
  font-size: clamp(26px, 3vw, 36px); font-weight: 800;
  background: linear-gradient(120deg, #43D9D9, #9BF5EC);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats-dl dd { margin-top: 8px; font-size: 13px; color: #86B8B8; line-height: 1.6; }

/* 响应式补丁 */
@media (max-width: 1024px) {
  .seg-grid, .mod-grid, .tier-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .seg-grid, .mod-grid, .hook-grid, .tier-grid, .custom-grid { grid-template-columns: 1fr; }
  .stats-dl { grid-template-columns: repeat(2, 1fr); }
  .stats-dl > div:nth-child(3)::before { display: none; }
  .sub-hero { padding-top: 120px; }
}
@media (max-width: 480px) {
  .seg-card, .hook-card, .tier-card, .custom-card { padding: 26px 20px; }
  .detect-card { padding: 30px 22px; }
}

/* ---------- 服务模块视觉图（V4.1.1） ---------- */
.mod-vis { border-radius: 14px; overflow: hidden; margin-bottom: 22px; background: var(--bg); border: 1px solid var(--line); }
.mod-vis img { width: 100%; height: auto; display: block; }