:root {
  --navy: #2b3252;
  --green: #2fa876;
  --green-bright: #3cbf88;
  --green-deep: #1e8a5e;
  --teal: #3d9d8f;
  --mint: #eaf7f0;
  --mint-2: #f4fbf7;
  --orange: #f08300;
  --text-dark: #2b3252;
  --text-gray: #67718f;
  --card-shadow: 0 10px 34px rgba(43, 50, 82, .08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark); background: #fff; line-height: 1.7; overflow-x: hidden;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== 动效 ===== */
html.js .reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s cubic-bezier(.22,.8,.32,1), transform .8s cubic-bezier(.22,.8,.32,1); }
html.js .reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: .1s; } .reveal.d2 { transition-delay: .22s; }
.reveal.d3 { transition-delay: .34s; } .reveal.d4 { transition-delay: .46s; }
@keyframes floatY { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-18px) } }
@keyframes floatY2 { 0%,100% { transform: translateY(0) rotate(0deg) } 50% { transform: translateY(14px) rotate(6deg) } }
@keyframes pulseGlow { 0%,100% { opacity:.5; transform: scale(1) } 50% { opacity:.8; transform: scale(1.08) } }
@keyframes fadeUpIn { from { opacity:0; transform: translateY(26px) } to { opacity:1; transform: translateY(0) } }
@keyframes shimmerArrow { 0%,100% { transform: translateX(0) } 50% { transform: translateX(5px) } }
@keyframes slideX { from { background-position: 0% 0 } to { background-position: 200% 0 } }
@keyframes fillBar { from { width: 0 } to { width: 100% } }

/* ===== 导航 ===== */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(43,50,82,.06);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 58px; gap: 20px; }
.brand-logo { height: 36px; display: block; }
.nav-menu { display: flex; align-items: center; gap: 2px; flex: 1; justify-content: center; }
.nav-link {
  position: relative; color: var(--text-gray); font-size: 14.5px; text-decoration: none;
  padding: 6px 13px; border-radius: 9px; transition: all .2s; white-space: nowrap;
}
.nav-link:hover { color: var(--green); background: var(--mint); }
.nav-link.active { color: var(--green); font-weight: 600; }
.nav-link.active::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 2px; height: 3px;
  border-radius: 99px; background: linear-gradient(90deg, var(--green), var(--teal));
}
.nav-cta {
  display: inline-block; padding: 8px 22px; border-radius: 999px;
  background: linear-gradient(90deg, var(--green) 0%, var(--green-bright) 100%);
  color: #fff; font-size: 14px; font-weight: 600; text-decoration: none;
  box-shadow: 0 5px 14px rgba(47,168,118,.3); transition: all .25s; white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(47,168,118,.4); }

/* 汉堡按钮（仅移动端显示） */
.nav-burger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; padding: 0 9px; border: none; border-radius: 10px;
  background: var(--mint); cursor: pointer; transition: background .2s;
}
.nav-burger:hover { background: #d5efe2; }
.nav-burger span { display: block; height: 2.5px; width: 100%; border-radius: 99px; background: var(--green-deep); transition: transform .3s, opacity .3s; }
.nav-burger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* 移动端下拉菜单 */
.nav-mobile { display: none; }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; padding: 80px 0 90px;
  background: linear-gradient(160deg, #ffffff 0%, var(--mint-2) 45%, var(--mint) 100%);
}
/* 科技感：网格底纹 */
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(47,168,118,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47,168,118,.07) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 20%, #000 30%, transparent 75%);
}
/* 科技感：数据节点网络 */
.hero-net { position: absolute; right: 0; top: 0; height: 100%; width: 46%; pointer-events: none; opacity: .5; }
.hero-net line { stroke: rgba(47,168,118,.35); stroke-width: 1; stroke-dasharray: 5 7; animation: dashMove 3.2s linear infinite; }
.hero-net circle { fill: rgba(47,168,118,.5); }
.hero-net circle.pulse { animation: pulseGlow 3s ease-in-out infinite; transform-origin: center; }
@keyframes dashMove { to { stroke-dashoffset: -24; } }
/* 科技感：扫描线 */
@keyframes scanY { 0% { top: -8% } 100% { top: 108% } }
.hv-scan {
  position: absolute; left: 6%; right: 6%; height: 46px; z-index: 2; pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(60,191,136,.12) 60%, rgba(60,191,136,.28));
  border-radius: 8px; filter: blur(1px);
  animation: scanY 4.5s ease-in-out infinite;
}
/* 科技感：四角括号 */
.hv-corner { position: absolute; width: 22px; height: 22px; z-index: 2; pointer-events: none; }
.hv-corner::before, .hv-corner::after { content: ""; position: absolute; background: var(--green); border-radius: 2px; }
.hv-corner::before { width: 100%; height: 2.5px; }
.hv-corner::after { width: 2.5px; height: 100%; }
.hc-tl { top: -7px; left: -7px; } .hc-tl::before { top: 0 } .hc-tl::after { left: 0 }
.hc-tr { top: -7px; right: -7px; } .hc-tr::before { top: 0 } .hc-tr::after { right: 0 }
.hc-bl { bottom: -7px; left: -7px; } .hc-bl::before { bottom: 0 } .hc-bl::after { left: 0 }
.hc-br { bottom: -7px; right: -7px; } .hc-br::before { bottom: 0 } .hc-br::after { right: 0 }
.blob { position: absolute; border-radius: 50%; filter: blur(60px); pointer-events: none; }
.blob-1 { width: 420px; height: 420px; background: rgba(60,191,136,.18); top: -120px; right: -80px; animation: pulseGlow 7s ease-in-out infinite; }
.blob-2 { width: 340px; height: 340px; background: rgba(61,157,143,.14); bottom: -100px; left: -60px; animation: pulseGlow 9s ease-in-out 1s infinite; }
.blob-3 { width: 180px; height: 180px; background: rgba(240,131,0,.08); top: 40%; left: 42%; animation: pulseGlow 8s ease-in-out .5s infinite; }
.shape { position: absolute; pointer-events: none; opacity: .55; }
.shape-1 { width: 54px; height: 54px; border-radius: 16px 4px 16px 4px; background: linear-gradient(135deg, var(--green), var(--teal)); top: 120px; left: 46%; animation: floatY2 8s ease-in-out infinite; }
.shape-2 { width: 30px; height: 30px; border-radius: 50%; border: 3px solid var(--green-bright); bottom: 130px; left: 8%; animation: floatY 6s ease-in-out infinite; }
.shape-3 { width: 22px; height: 22px; border-radius: 6px; background: var(--orange); opacity: .35; top: 150px; right: 12%; animation: floatY 7s ease-in-out .8s infinite; }
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }
.hero-left > * { animation: fadeUpIn .9s cubic-bezier(.22,.8,.32,1) both; }
.hero-left .hero-badge { animation-delay: .05s; }
.hero-left .sub { animation-delay: .14s; }
.hero-left .hero-rotator { animation-delay: .24s; }
.hero-left .hero-actions { animation-delay: .4s; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 18px; border-radius: 999px;
  background: #fff; border: 1px solid rgba(47,168,118,.35);
  color: var(--green); font-size: 14px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 26px; box-shadow: 0 4px 14px rgba(47,168,118,.1);
}
.hero-badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green-bright); animation: pulseGlow 2s ease-in-out infinite; }
.hero h1 { font-size: 46px; line-height: 1.28; font-weight: 800; letter-spacing: 1px; margin-bottom: 16px; }
.hero h1 .accent { background: linear-gradient(90deg, var(--green), var(--teal)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .sub { font-size: 17.5px; color: var(--text-gray); margin-bottom: 34px; }
.hero-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 38px; }
.btn-main {
  display: inline-flex; align-items: center; gap: 10px; padding: 16px 44px; border-radius: 999px;
  background: linear-gradient(90deg, var(--green) 0%, var(--green-bright) 100%);
  color: #fff; font-size: 18px; font-weight: 700; text-decoration: none;
  box-shadow: 0 12px 30px rgba(47,168,118,.35); transition: all .25s;
}
.btn-main:hover { transform: translateY(-3px); box-shadow: 0 16px 38px rgba(47,168,118,.45); }
.btn-main .arrow { animation: shimmerArrow 1.6s ease-in-out infinite; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px; padding: 15px 32px; border-radius: 999px;
  border: 1.5px solid rgba(43,50,82,.18); background: #fff;
  color: var(--text-dark); font-size: 16px; text-decoration: none; transition: all .2s;
}
.btn-ghost:hover { border-color: var(--green); color: var(--green); }

/* ===== 头部大字号优势轮播 ===== */
.hero-rotator { position: relative; max-width: 760px; }
.rot-slides { position: relative; min-height: 150px; }
.rot-slide {
  position: absolute; inset: 0; opacity: 0; transform: translateY(30px);
  transition: opacity .55s cubic-bezier(.22,.8,.32,1), transform .55s cubic-bezier(.22,.8,.32,1);
  pointer-events: none;
}
.rot-slide.active { opacity: 1; transform: translateY(0); pointer-events: auto; }
.rot-slide.leaving { opacity: 0; transform: translateY(-30px); }
.rot-slide h2 {
  font-size: 52px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; margin-bottom: 14px;
}
.rot-slide h2 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--green), var(--teal));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.rot-slide p { font-size: 16.5px; color: var(--text-gray); max-width: 560px; }
.rot-nav { display: flex; align-items: center; gap: 22px; margin-top: 30px; }
.rot-dots { display: flex; gap: 8px; }
.rot-dot { width: 8px; height: 8px; border-radius: 999px; border: none; cursor: pointer; background: #cfd8e3; transition: all .35s; padding: 0; }
.rot-dot.active { width: 26px; background: linear-gradient(90deg, var(--green), var(--green-bright)); }
.rot-count { font-size: 13px; color: #b3bacb; font-weight: 600; letter-spacing: 2px; }
.rot-count b { color: var(--green); font-size: 16px; }
.rot-progress { flex: 1; max-width: 180px; height: 3px; border-radius: 99px; background: #e3eaf2; overflow: hidden; }
.rot-progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--green), var(--teal)); border-radius: 99px; }
.rot-progress i.run { animation: fillBar 4s linear forwards; }

/* ===== Hero 右侧视觉卡 ===== */
.hero-visual { position: relative; animation: fadeUpIn 1s .35s cubic-bezier(.22,.8,.32,1) both; }
.hv-glow {
  position: absolute; inset: 20px -18px -18px 20px; border-radius: 28px;
  background: linear-gradient(135deg, rgba(60,191,136,.22), rgba(61,157,143,.12)); filter: blur(2px);
}
.hv-card {
  position: relative; background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.9); border-radius: 26px; box-shadow: var(--card-shadow);
  padding: 36px 34px 30px; overflow: hidden;
}
.hv-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--green), var(--teal), var(--green));
  background-size: 200% 100%; animation: slideX 4s linear infinite;
}
.hv-row {
  display: flex; align-items: center; gap: 14px; padding: 13px 0;
  border-bottom: 1px dashed rgba(43,50,82,.12); font-size: 15.5px; font-weight: 600;
}
.hv-row:last-of-type { border-bottom: none; }
.hv-row .hv-ico {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  background: linear-gradient(135deg, var(--mint), #d9f2e5);
}
.hv-row small { display: block; font-size: 12.5px; color: var(--text-gray); font-weight: 400; margin-top: 1px; }
.hv-chip {
  position: absolute; right: -14px; bottom: 34px; background: #fff; border-radius: 999px;
  padding: 10px 20px; font-size: 13.5px; font-weight: 700; color: var(--green-deep);
  box-shadow: 0 10px 26px rgba(43,50,82,.15); animation: floatY 5s ease-in-out infinite;
}
.hv-chip::before { content: "🎁 "; }

/* ===== Section 通用 ===== */
section { padding: 84px 0; }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-tag {
  display: inline-block; padding: 5px 18px; border-radius: 999px;
  background: var(--mint); color: var(--green); font-size: 13.5px; font-weight: 600;
  letter-spacing: 2px; margin-bottom: 14px;
}
.sec-head h2 { font-size: 33px; font-weight: 800; letter-spacing: 1px; }
.sec-head p { color: var(--text-gray); font-size: 16px; margin-top: 10px; }

/* ===== 关于码单 ===== */
#about {
  background-color: #fff;
  background-image: radial-gradient(rgba(47,168,118,.08) 1.2px, transparent 1.2px);
  background-size: 26px 26px;
  padding-top: 96px;
}
.pos-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.pos-quote {
  border-left: 5px solid var(--green); background: #fff; border-radius: 0 16px 16px 0;
  padding: 28px 30px; box-shadow: var(--card-shadow); font-size: 18.5px; font-weight: 600;
}
.pos-quote .q-mark { color: var(--green); font-size: 34px; font-weight: 800; line-height: 0; vertical-align: -8px; margin-right: 6px; }
.pos-desc { color: var(--text-gray); font-size: 16px; margin-top: 22px; }
.chain { margin-top: 26px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14.5px; font-weight: 600; }
.chain .node { padding: 8px 16px; border-radius: 999px; background: var(--mint); color: var(--green-deep); }
.chain .sep { color: var(--orange); font-weight: 800; }
.chain-cap { font-size: 13px; color: var(--text-gray); margin-top: 10px; }
.pos-visual {
  background: linear-gradient(150deg, #ffffff, var(--mint-2));
  border: 1px solid rgba(47,168,118,.18); border-radius: 20px; padding: 36px 32px; box-shadow: var(--card-shadow);
}
.pos-visual h3 { font-size: 19px; margin-bottom: 18px; color: var(--green-deep); }
.pos-visual li { list-style: none; padding: 10px 0; border-bottom: 1px dashed rgba(43,50,82,.12); font-size: 15.5px; display: flex; gap: 10px; align-items: baseline; }
.pos-visual li:last-child { border-bottom: none; }
.pos-visual li::before { content: "✓"; color: var(--green); font-weight: 800; }

/* ===== 解决方案 ===== */
.solutions-band { background: var(--mint-2); }
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol-card {
  background: #fff; border-radius: 16px; padding: 26px 24px;
  border: 1px solid rgba(43,50,82,.06); box-shadow: var(--card-shadow);
  transition: all .3s;
}
.sol-card:hover { transform: translateY(-5px); box-shadow: 0 16px 36px rgba(43,50,82,.12); }
.sol-pain { display: inline-block; padding: 3px 12px; border-radius: 999px; background: #fdeee0; color: var(--orange); font-size: 12px; font-weight: 600; margin-bottom: 12px; }
.sol-card h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.sol-card h4::before { content: "✓ "; color: var(--green); }
.sol-card p { font-size: 13.5px; color: var(--text-gray); }

/* 六大能力带 */
.cap-band { background: linear-gradient(120deg, var(--green-deep) 0%, var(--green) 55%, var(--teal) 100%); color: #fff; position: relative; overflow: hidden; padding: 70px 0; }
.cap-band .blob { opacity: .5; }
.cap-band-blob1 { width: 400px; height: 400px; background: rgba(255,255,255,.12); top: -160px; right: -100px; }
.cap-band-blob2 { width: 300px; height: 300px; background: rgba(255,255,255,.1); bottom: -140px; left: -60px; }
.cap-band .container { position: relative; z-index: 1; }
.cap-band .sec-tag { background: rgba(255,255,255,.16); color: #fff; }
.cap-band .sec-head h2 { color: #fff; }
.cap-band .sec-head { margin-bottom: 36px; }
.cap-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.cap-item { text-align: center; padding: 18px 6px; transition: transform .3s; }
.cap-item:hover { transform: translateY(-6px); }
.cap-icon {
  width: 58px; height: 58px; margin: 0 auto 12px; border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,.5); background: rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center; color: #fff; transition: all .3s;
}
.cap-icon svg { width: 26px; height: 26px; }
.cap-item:hover .cap-icon { background: rgba(255,255,255,.25); transform: scale(1.1); }
.cap-item span { font-size: 14.5px; font-weight: 600; letter-spacing: 1px; }

/* ===== 系统优势 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 26px; }
.stat-card {
  background: #fff; border-radius: 18px; text-align: center; padding: 30px 16px;
  border: 1px solid rgba(43,50,82,.06); box-shadow: var(--card-shadow); transition: transform .3s;
}
.stat-card:hover { transform: translateY(-6px); }
.stat-num { font-size: 36px; font-weight: 800; background: linear-gradient(90deg, var(--green), var(--teal)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-num small { font-size: 15px; font-weight: 600; margin-left: 2px; }
.stat-label { font-size: 13.5px; color: var(--text-gray); margin-top: 4px; }
.adv3-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.adv3-card {
  background: linear-gradient(160deg, #fff, var(--mint-2)); border: 1px solid rgba(47,168,118,.15);
  border-radius: 18px; padding: 30px 26px; box-shadow: var(--card-shadow); transition: all .3s;
}
.adv3-card:hover { transform: translateY(-6px); }
.adv3-card .ico { width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 26px; background: linear-gradient(135deg, var(--mint), #d9f2e5); margin-bottom: 16px; }
.adv3-card h4 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.adv3-card p { font-size: 14px; color: var(--text-gray); }

/* ===== 功能模块 ===== */
.modules-band { background: linear-gradient(180deg, #fff, var(--mint-2)); }
.modules-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.module-card {
  background: #fff; border-radius: 18px; padding: 30px 24px; text-align: center;
  border: 1px solid rgba(43,50,82,.06); box-shadow: var(--card-shadow); transition: all .3s;
}
.module-card:hover { transform: translateY(-8px); box-shadow: 0 20px 44px rgba(43,50,82,.13); }
.module-icon {
  width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center; font-size: 28px;
  background: linear-gradient(135deg, var(--mint), #d9f2e5); transition: transform .3s;
}
.module-card:hover .module-icon { transform: scale(1.12) rotate(-5deg); }
.module-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.module-card p { font-size: 14px; color: var(--text-gray); }
.module-badge { display: inline-block; margin-top: 14px; padding: 3px 12px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.mb-hot { background: #fdeee0; color: var(--orange); }
.mb-full { background: var(--mint); color: var(--green); }

/* ===== 使用对象 ===== */
.aud-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.aud-card {
  background: #fff; border-radius: 18px; text-align: center; padding: 32px 18px;
  border: 1px solid rgba(43,50,82,.06); box-shadow: var(--card-shadow); transition: all .3s;
}
.aud-card:hover { transform: translateY(-7px); border-color: rgba(47,168,118,.35); }
.aud-card .ico {
  width: 60px; height: 60px; margin: 0 auto 14px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 26px;
  background: linear-gradient(135deg, var(--mint), #d9f2e5); transition: transform .3s;
}
.aud-card:hover .ico { transform: scale(1.1); }
.aud-card h4 { font-size: 16.5px; font-weight: 700; margin-bottom: 6px; }
.aud-card p { font-size: 13px; color: var(--text-gray); }

/* ===== 如何开通 ===== */
#start { background: linear-gradient(140deg, #ffffff 0%, var(--mint) 60%, #d9f2e5 100%); position: relative; overflow: hidden; }
#start .shape-4 { width: 36px; height: 36px; border-radius: 50%; border: 3px solid var(--green-bright); top: 100px; left: 10%; opacity: .4; animation: floatY 6s ease-in-out infinite; }
#start .container { position: relative; z-index: 1; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 56px; position: relative; }
.step {
  background: #fff; border-radius: 20px; padding: 34px 28px; text-align: center;
  box-shadow: var(--card-shadow); position: relative; transition: all .3s; border: 1px solid rgba(47,168,118,.12);
}
.step:hover { transform: translateY(-6px); }
.step-no {
  width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--teal)); color: #fff;
  font-size: 22px; font-weight: 800; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px rgba(47,168,118,.3);
}
.step h4 { font-size: 18px; font-weight: 800; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-gray); }
.step .tag { display: inline-block; margin-top: 12px; padding: 3px 14px; border-radius: 999px; background: var(--mint); color: var(--green-deep); font-size: 12.5px; font-weight: 600; }
.start-cta { text-align: center; }
.start-cta h3 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.start-cta h3 .accent { background: linear-gradient(90deg, var(--green), var(--teal)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.start-cta > p { font-size: 16px; color: var(--text-gray); margin-bottom: 34px; }
.cta-entries { display: flex; justify-content: center; gap: 44px; flex-wrap: wrap; margin-top: 44px; }
.entry-item { text-align: center; }
.entry-item .ico { font-size: 26px; margin-bottom: 8px; }
.entry-item .t { font-size: 14.5px; font-weight: 600; }
.entry-item .d { font-size: 12.5px; color: var(--text-gray); }
.entry-qr img {
  width: 128px; height: 128px; border-radius: 14px; display: block;
  margin: 0 auto 10px; box-shadow: var(--card-shadow); background: #fff;
  padding: 6px; border: 1px solid rgba(43,50,82,.08);
  transition: transform .3s;
}
.entry-qr img:hover { transform: scale(1.05); }

/* ===== 无障碍 / SEO 隐藏标题 ===== */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== 回到顶部 ===== */
.to-top {
  position: fixed; right: 28px; bottom: 34px; z-index: 120;
  width: 48px; height: 48px; border: 0; border-radius: 50%; cursor: pointer;
  background: linear-gradient(135deg, var(--green), var(--teal));
  color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px rgba(47,168,118,.38);
  opacity: 0; visibility: hidden; transform: translateY(16px) scale(.9);
  transition: all .32s cubic-bezier(.22,.8,.32,1);
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.to-top:hover { transform: translateY(-4px); box-shadow: 0 14px 32px rgba(47,168,118,.5); }
.to-top svg { width: 22px; height: 22px; }

/* ===== FAQ 问答区 ===== */
.faq-band { background: linear-gradient(180deg, #fff, var(--mint-2)); }
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid rgba(43,50,82,.07); border-radius: 16px;
  box-shadow: var(--card-shadow); overflow: hidden;
}
.faq-q {
  width: 100%; text-align: left; border: 0; background: none; cursor: pointer;
  padding: 20px 24px; font-size: 16.5px; font-weight: 700; color: var(--text-dark);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-family: inherit;
}
.faq-q::before { content: "Q"; color: var(--green); font-weight: 800; margin-right: 10px; }
.faq-q .caret {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
  background: var(--mint); color: var(--green-deep); font-size: 14px;
  display: flex; align-items: center; justify-content: center; transition: transform .3s;
}
.faq-item.open .faq-q .caret { transform: rotate(180deg); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .35s cubic-bezier(.22,.8,.32,1);
}
.faq-a p { padding: 0 24px 22px 52px; font-size: 15px; color: var(--text-gray); }
.faq-a p::before { content: "A "; color: var(--green-deep); font-weight: 800; margin-right: 6px; }
.faq-item.open .faq-a { max-height: 320px; }
footer { background: linear-gradient(120deg, var(--green-deep) 0%, #17795a 55%, #2a8a76 100%); color: rgba(255,255,255,.8); margin-top: 0; padding: 60px 0 0; overflow: hidden; }
.foot-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 44px; }
.foot-brand img { height: 38px; margin-bottom: 16px; border-radius: 6px; }
.foot-brand p { font-size: 13.5px; max-width: 340px; color: rgba(255,255,255,.6); }
.foot-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.foot-cols h5 { color: #fff; font-size: 14px; font-weight: 500; margin-bottom: 14px; }
.foot-cols a, .foot-cols span { display: block; font-size: 13.5px; color: rgba(255,255,255,.62); padding: 4px 0; transition: color .2s; text-decoration: none; }
.foot-cols a:hover { color: #ffffff; }
.foot-bar {
  border-top: 1px solid rgba(255,255,255,.14); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 12.5px; color: rgba(255,255,255,.5);
}
.foot-bar a { color: rgba(255,255,255,.5); text-decoration: none; }
.foot-bar a:hover { color: #fff; }

/* 数据口径说明 */
.stats-note { text-align: center; font-size: 12.5px; color: #93a0b5; margin-top: 18px; }

@media (max-width: 960px) {
  .nav-menu { display: none; }
  .nav-burger { display: flex; }
  .navbar .container { justify-content: flex-start; }
  .navbar .container .nav-cta { margin-left: auto; }
  .nav-mobile {
    display: flex; flex-direction: column; gap: 2px;
    max-height: 0; overflow: hidden; padding: 0 16px;
    transition: max-height .38s cubic-bezier(.22,.8,.32,1), padding .38s;
    background: rgba(255,255,255,.97);
  }
  .nav-mobile.open { max-height: 460px; padding: 10px 16px 18px; }
  .nav-mobile .nav-link { padding: 12px 14px; font-size: 15px; border-radius: 10px; }
  .nav-mobile .nav-cta { margin-top: 10px; text-align: center; padding: 12px 22px; }
  .hero { padding: 56px 0 70px; }
  .hero .container { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 480px; }
  .rot-slide h2 { font-size: 36px; }
  .rot-slides { min-height: 138px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .pos-grid { grid-template-columns: 1fr; }
  .sol-grid { grid-template-columns: 1fr; }
  .adv3-grid { grid-template-columns: 1fr; }
  .aud-grid { grid-template-columns: repeat(2, 1fr); }
  .modules-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .navbar .container { gap: 10px; }
  .brand-logo { height: 32px; }
  .navbar .container .nav-cta { padding: 7px 14px; font-size: 13px; }
  .rot-slide h2 { font-size: 29px; }
  .rot-slides { min-height: 158px; }
  .aud-grid { grid-template-columns: 1fr; }
  .modules-grid { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
}