/* ============================================================
   帧语官网 · 共享样式 site.css
   多页结构：index(产品轮播) / about / product-*.html
   ============================================================ */

/* ============ 字体（Outfit 自托管 latin；中文走系统栈） ============ */
@font-face{font-family:'Outfit';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/outfit-latin-500.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Outfit';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/outfit-latin-600.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ============ Design Tokens ============ */
:root{
  --bg:#FFFAF0; --yellow:#FFC857; --coral:#FF8C7A; --blue:#6BB6E0;
  --dark:#2E2418; --footer-bg:#F7EFDD; --line:#F0E2C4; --line-2:#EBD9BC;
  --t1:#40342A; --t2:#6B5D4F; --t3:#8A7B68; --t4:#9A8C7A;
  --card-yellow:#FFF6E3; --card-coral:#FFE9E4; --card-blue:#E7F3FB; --card-purple:#F0EBFC; --card-green:#E7F4EC;
  --shadow-card:0 6px 20px rgba(255,200,87,.14);
  --shadow-illu:0 10px 28px rgba(255,200,87,.16);
  --shadow-mascot:0 8px 24px rgba(92,61,20,.18);
  --r-card:32px; --r-btn:24px;
  --font:'Outfit','Noto Sans SC',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --maxw:1048px;
  /* 产品色（页面内可被 --pc/--pc-bg 覆盖） */
  --pc:#FFC857; --pc-bg:#FFF6E3; --pc-deep:#40342A;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--t2);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--yellow);color:var(--t1)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{scroll-margin-top:80px}
main{display:block}

/* ============ 滚动显现（无 JS 时默认可见） ============ */
.js .reveal{opacity:0;transform:translateY(26px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
}

/* ============ 01 导航栏 ============ */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,250,240,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 2px 16px rgba(255,200,87,.08)}
.nav-inner{max-width:1200px;margin:0 auto;height:80px;display:flex;align-items:center;justify-content:space-between;padding:0 32px;gap:24px}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{width:44px;height:44px;border-radius:13px;background:var(--yellow);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(255,200,87,.35)}
.logo-mark svg{width:24px;height:24px}
.logo-name{font-size:22px;font-weight:600;color:var(--t1);letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:36px}
.nav-links a{font-size:15px;font-weight:500;color:var(--t2);transition:color .2s;position:relative}
.nav-links a::after{content:'';position:absolute;left:0;right:100%;bottom:-4px;height:2px;border-radius:2px;background:var(--yellow);transition:right .25s}
.nav-links a:hover{color:var(--t1)}
.nav-links a:hover::after{right:0}
.nav-cta{display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 26px;border-radius:var(--r-btn);background:var(--yellow);color:var(--t1);font-size:15px;font-weight:600;box-shadow:0 4px 14px rgba(255,200,87,.4);transition:transform .2s,box-shadow .2s,filter .2s;white-space:nowrap}
.nav-cta:hover{filter:brightness(.96);transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,200,87,.5)}
.nav-cta svg{width:17px;height:17px}
.hamburger{display:none;width:44px;height:44px;border-radius:12px;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.hamburger span{display:block;width:22px;height:2px;border-radius:2px;background:var(--t1);transition:transform .25s,opacity .25s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none;flex-direction:column;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 24px 20px}
.mobile-menu a{padding:14px 4px;font-size:16px;font-weight:500;color:var(--t1);border-bottom:1px solid var(--line)}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-menu .nav-cta{margin-top:14px;justify-content:center}

/* ============ 通用按钮 / 徽章 / 信任行 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:56px;padding:0 34px;border-radius:var(--r-btn);font-size:16px;font-weight:600;transition:transform .2s,box-shadow .2s,filter .2s,background .2s,border-color .2s;white-space:nowrap}
.btn svg{width:19px;height:19px;flex-shrink:0}
.btn-primary{background:var(--yellow);color:var(--t1);box-shadow:0 6px 18px rgba(255,200,87,.42)}
.btn-primary:hover{filter:brightness(.96);transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,200,87,.52)}
.btn-ghost{background:#fff;color:var(--t1);border:1.5px solid #E4D5B8}
.btn-ghost:hover{border-color:var(--yellow);transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,200,87,.18)}
.btn-dark{background:var(--dark);color:#fff;box-shadow:0 6px 18px rgba(46,36,24,.28)}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(46,36,24,.36)}
.btn-white{background:#fff;color:var(--t1);box-shadow:0 6px 18px rgba(46,36,24,.14)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(46,36,24,.2)}
.badge{display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 18px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--t2);font-size:13.5px;font-weight:500;box-shadow:0 2px 8px rgba(255,200,87,.12)}
.badge svg{width:14px;height:14px;flex-shrink:0}
.trust{display:flex;align-items:center;gap:10px;margin-top:34px;color:var(--t3);font-size:14.5px;font-weight:500}
.trust .stars{display:flex;gap:3px}
.trust .stars svg{width:17px;height:17px}

/* ============ 通用板块头 ============ */
.sec-head{text-align:center;max-width:640px;margin:0 auto 56px}
.eyebrow{font-family:'Outfit',sans-serif;font-size:13px;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--t3);display:block;margin-bottom:14px}
.sec-head h2{font-size:40px;line-height:1.3;font-weight:600;color:var(--t1);margin-bottom:16px}
.sec-head p{font-size:16px;color:var(--t2)}

/* ============ 首页 Hero（左文右图 · 紧凑版，主视觉让位产品轮播） ============ */
.hero{padding:56px 0 64px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr 400px;gap:48px;align-items:center}
.hero h1{margin:26px 0 22px;font-size:48px;line-height:1.25;font-weight:600;color:var(--t1);letter-spacing:.5px}
.hero-sub{font-size:16.5px;line-height:1.75;color:var(--t2);max-width:520px}
.hero-btns{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-illu{width:400px;height:400px;border-radius:40px;box-shadow:var(--shadow-illu)}
.star-deco{position:absolute;pointer-events:none}
.star-deco.s1{width:24px;height:24px;top:-14px;right:36px;animation:twinkle 3.2s ease-in-out infinite}
.star-deco.s2{width:16px;height:16px;bottom:30px;left:-16px;animation:twinkle 2.6s ease-in-out .6s infinite}
.star-deco.s3{width:20px;height:20px;top:96px;left:-26px;animation:twinkle 3.8s ease-in-out 1.1s infinite}

/* ============ 产品轮播（主界面核心） ============ */
.carousel-sec{padding:24px 0 96px}
.carousel{position:relative;max-width:1048px;margin:0 auto}
.car-viewport{position:relative}
/* 无 JS 时：所有 slide 纵向堆叠，保证内容可见可访问 */
.car-slide{display:grid;grid-template-columns:1fr 400px;gap:48px;align-items:center;padding:8px 0}
/* 有 JS 时：flex 横排 + track 平移（align-items:flex-start 保证各 slide 保持自然高度供测高） */
.js .car-viewport{overflow:hidden}
.js .car-track{position:absolute;top:0;left:0;right:0;display:flex;align-items:flex-start;transition:transform .6s cubic-bezier(.22,.61,.36,1)}
.js .car-slide{flex:0 0 100%;width:100%;padding:0;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .45s ease,visibility .45s}
.js .car-slide.active{opacity:1;visibility:visible;pointer-events:auto}
.js .car-viewport{transition:height .45s cubic-bezier(.22,.61,.36,1)}
.car-tagline{font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--pc-deep);margin-bottom:10px;font-family:'Outfit','Noto Sans SC',sans-serif}
.car-head{display:flex;align-items:center;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.car-head h3{font-size:34px;font-weight:600;color:var(--t1);line-height:1.2}
.icon-circle{width:56px;height:56px;border-radius:28px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.icon-circle svg{width:26px;height:26px}
.ic-yellow{background:var(--yellow)} .ic-blue{background:var(--card-blue)} .ic-coral{background:var(--card-coral)} .ic-purple{background:var(--card-purple)} .ic-green{background:var(--card-green)}
.prod-tag{display:inline-flex;align-items:center;height:26px;padding:0 13px;border-radius:999px;background:var(--coral);color:#fff;font-size:12px;font-weight:600;box-shadow:0 3px 8px rgba(255,140,122,.35)}
.car-desc{font-size:16px;line-height:1.75;color:var(--t2);margin-bottom:20px;max-width:520px}
.points{list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:28px}
.points li{display:flex;align-items:flex-start;gap:9px;font-size:14px;color:var(--t2);line-height:1.55}
.points li svg{width:16px;height:16px;flex-shrink:0;margin-top:3px}
.car-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 轮播右侧产品视觉面板 */
.car-panel{position:relative;background:var(--pc-bg);border-radius:40px;min-height:400px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;box-shadow:var(--shadow-illu);overflow:hidden;padding:40px}
.car-panel .big-ic{width:104px;height:104px;border-radius:30px;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(255,200,87,.22)}
.car-panel .big-ic svg{width:56px;height:56px}
.car-panel .panel-name{font-size:22px;font-weight:600;color:var(--t1)}
.car-panel .panel-sub{font-size:14px;color:var(--t3);text-align:center;max-width:260px;line-height:1.6}
.car-panel .p-star{position:absolute;pointer-events:none}
.car-panel .p-star.a{width:30px;height:30px;top:34px;right:52px}
.car-panel .p-star.b{width:18px;height:18px;bottom:52px;left:44px}
.car-panel .p-star.c{width:22px;height:22px;top:88px;left:36px}
@keyframes twinkle{0%,100%{opacity:1;transform:scale(1) rotate(0deg)}50%{opacity:.55;transform:scale(.82) rotate(18deg)}}
.car-panel .p-star{animation:twinkle 3.4s ease-in-out infinite}
.car-panel .p-star.b{animation-delay:.7s}
.car-panel .p-star.c{animation-delay:1.3s}

/* 轮播控制条：计数 + 圆点 + 箭头 */
.car-controls{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:36px}
.car-counter{font-family:'Outfit',sans-serif;font-size:15px;font-weight:600;letter-spacing:2px;color:var(--t3);min-width:64px}
.car-dots{display:flex;align-items:center;gap:10px}
.car-dot{width:10px;height:10px;border-radius:999px;background:#EBD9BC;transition:width .3s,background .3s;padding:0}
.car-dot.active{width:30px;background:var(--dotc,var(--yellow))}
.car-arrows{display:flex;gap:12px;min-width:64px;justify-content:flex-end}
.car-arrow{width:48px;height:48px;border-radius:999px;background:#fff;border:1.5px solid var(--line-2);display:flex;align-items:center;justify-content:center;color:var(--t1);transition:transform .2s,border-color .2s,box-shadow .2s}
.car-arrow svg{width:20px;height:20px}
.car-arrow:hover{border-color:var(--yellow);transform:translateY(-2px);box-shadow:0 8px 18px rgba(255,200,87,.2)}
.car-arrow:active{transform:translateY(0)}

/* ============ 05 数据带 ============ */
.stats{background:var(--yellow);padding:56px 0;position:relative;overflow:hidden}
.stats-grid{display:flex;justify-content:space-between;align-items:center;gap:32px;position:relative;z-index:1}
.stat{text-align:center;flex:1}
.stat .num{font-family:'Outfit','Noto Sans SC',sans-serif;font-size:44px;font-weight:600;color:var(--t1);line-height:1.15;letter-spacing:.5px}
.stat .label{font-size:14px;color:rgba(64,52,42,.78);margin-top:6px;font-weight:500}
.stats .star-deco{position:absolute;top:50%;transform:translateY(-50%);width:30px;height:30px;opacity:.9}
.stats .star-deco.left{left:48px}
.stats .star-deco.right{right:48px}

/* ============ 07 CTA ============ */
.cta{background:var(--yellow);padding:72px 0;position:relative;overflow:hidden}
.cta-grid{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:center;position:relative;z-index:1}
.cta h2{font-size:44px;font-weight:600;color:var(--t1);line-height:1.25;margin-bottom:16px}
.cta p{font-size:16px;color:rgba(64,52,42,.82);margin-bottom:32px;max-width:520px}
.cta-btns{display:flex;gap:16px;flex-wrap:wrap}
.mascot{width:300px;height:300px;border-radius:50%;box-shadow:var(--shadow-mascot);justify-self:end;animation:float 5s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ============ 08 页脚 ============ */
.footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:18px}
.footer-slogan{font-size:14.5px;color:var(--t2);margin-bottom:8px}
.footer-mail{font-size:13.5px;color:var(--t3)}
.footer-col h4{font-size:15px;font-weight:600;color:var(--t1);margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:var(--t2);padding:5px 0;transition:color .2s}
.footer-col a:hover{color:var(--t1)}
.footer-bottom{border-top:1px solid var(--line-2);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--t4)}

/* ============ Toast ============ */
.toast{position:fixed;left:50%;bottom:48px;transform:translateX(-50%) translateY(20px);background:var(--dark);color:#fff;font-size:14px;padding:13px 26px;border-radius:999px;box-shadow:0 10px 30px rgba(46,36,24,.35);opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:200}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ 关于页（about.html） ============ */
.about{padding:96px 0}
.about-grid{display:grid;grid-template-columns:620px 1fr;gap:64px;align-items:center}
.about-illu{border-radius:32px;box-shadow:var(--shadow-illu);width:100%}
.about-text .eyebrow{text-align:left}
.about-text h2{font-size:40px;line-height:1.3;font-weight:600;color:var(--t1);margin-bottom:22px}
.about-text p{font-size:15.5px;line-height:1.8;color:var(--t2);margin-bottom:16px}
.value-pills{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.value-pills span{background:#fff;border-radius:20px;padding:9px 20px;font-size:13.5px;font-weight:500;color:var(--t1);box-shadow:0 3px 10px rgba(255,200,87,.14)}
.why{padding:96px 0}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.why-card{border-radius:var(--r-card);padding:26px 24px;transition:transform .2s,box-shadow .2s}
.why-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.why-card .icon-circle{width:52px;height:52px;border-radius:26px;margin-bottom:16px}
.why-card .icon-circle svg{width:24px;height:24px}
.why-card h3{font-size:18px;font-weight:600;color:var(--t1);margin-bottom:8px}
.why-card p{font-size:13px;line-height:1.7;color:var(--t2)}

/* ============ 产品详情页（product-*.html） ============ */
.psec{padding:80px 0}
.phero{padding:56px 0 72px}
.phero-grid{display:grid;grid-template-columns:1fr 400px;gap:56px;align-items:center}
.phero .icon-circle{width:72px;height:72px;border-radius:24px;margin-bottom:22px}
.phero .icon-circle svg{width:38px;height:38px}
.phero h1{font-size:44px;line-height:1.25;font-weight:600;color:var(--t1);margin-bottom:14px}
.phero-tag{font-size:19px;font-weight:500;color:var(--t1);margin-bottom:14px}
.phero-desc{font-size:16px;line-height:1.75;color:var(--t2);max-width:520px;margin-bottom:30px}
.phero-btns{display:flex;gap:14px;flex-wrap:wrap}
.phero .car-panel{min-height:400px}
.phero-visual{position:relative}

.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat-card{background:#fff;border-radius:var(--r-card);padding:28px 26px;box-shadow:var(--shadow-card);transition:transform .2s,box-shadow .2s}
.feat-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(255,200,87,.22)}
.feat-card .icon-circle{width:48px;height:48px;border-radius:24px;margin-bottom:18px}
.feat-card .icon-circle svg{width:22px;height:22px}
.feat-card h3{font-size:18px;font-weight:600;color:var(--t1);margin-bottom:8px}
.feat-card p{font-size:13.5px;line-height:1.7;color:var(--t2)}

.flow-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.flow-card{position:relative;background:#fff;border-radius:var(--r-card);padding:32px 28px 28px;box-shadow:var(--shadow-card);overflow:hidden}
.flow-card .step-no{font-family:'Outfit',sans-serif;font-size:52px;font-weight:600;line-height:1;color:var(--pc);opacity:.9;display:block;margin-bottom:14px}
.flow-card h3{font-size:19px;font-weight:600;color:var(--t1);margin-bottom:8px}
.flow-card p{font-size:14px;line-height:1.7;color:var(--t2)}
.flow-card::after{content:'';position:absolute;right:-28px;top:-28px;width:84px;height:84px;border-radius:50%;background:var(--pc-bg);opacity:.7}

.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rel-card{display:flex;align-items:center;gap:14px;background:#fff;border-radius:24px;padding:18px 20px;box-shadow:var(--shadow-card);transition:transform .2s,box-shadow .2s}
.rel-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(255,200,87,.2)}
.rel-card .icon-circle{width:44px;height:44px;border-radius:22px;margin-bottom:0}
.rel-card .icon-circle svg{width:21px;height:21px}
.rel-card h3{font-size:16px;font-weight:600;color:var(--t1);margin-bottom:2px}
.rel-card p{font-size:12.5px;color:var(--t3);line-height:1.5}

.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t3);margin-bottom:26px;flex-wrap:wrap}
.crumb a{color:var(--t2);font-weight:500;transition:color .2s}
.crumb a:hover{color:var(--t1)}
.crumb .sep{color:var(--line-2)}
.crumb .cur{color:var(--t1);font-weight:600}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .hero h1{font-size:42px}
  .hero-grid{grid-template-columns:1fr 340px;gap:40px}
  .hero-illu{width:340px;height:340px}
  .carousel{max-width:960px}
  .phero-grid{grid-template-columns:1fr 340px;gap:40px}
  .phero .car-panel{min-height:340px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .hamburger{display:flex}
  .mobile-menu.open{display:flex}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{order:2;max-width:420px;margin:0 auto}
  .hero-illu{width:100%;height:auto;aspect-ratio:1/1}
  .hero h1{font-size:40px}
  .star-deco.s3{left:-10px}
  .car-slide{grid-template-columns:1fr;gap:32px}
  .carousel-sec{padding:16px 0 72px}
  .car-controls{margin-top:28px}
  .phero{padding:40px 0 56px}
  .phero-grid{grid-template-columns:1fr}
  .phero-visual{max-width:440px;margin:0 auto;order:-1}
  .phero h1{font-size:34px}
  .flow-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .about-illu{max-width:560px;margin:0 auto}
  .cta-grid{grid-template-columns:1fr;text-align:center}
  .cta p{margin-left:auto;margin-right:auto}
  .cta-btns{justify-content:center}
  .mascot{justify-self:center;width:220px;height:220px}
  .cta h2{font-size:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stats .star-deco{display:none}
  .why-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  body{font-size:15px}
  .wrap{padding:0 20px}
  .nav-inner{padding:0 20px;height:64px}
  .logo-mark{width:38px;height:38px;border-radius:11px}
  .logo-name{font-size:19px}
  section{scroll-margin-top:64px}
  .hero h1{font-size:33px}
  .hero-sub{font-size:15.5px}
  .sec-head h2,.about-text h2{font-size:29px}
  .sec-head{margin-bottom:40px}
  .car-head h3{font-size:27px}
  .car-panel{min-height:300px;border-radius:32px;padding:32px 24px}
  .car-panel .big-ic{width:84px;height:84px;border-radius:24px}
  .car-panel .big-ic svg{width:44px;height:44px}
  .car-counter{min-width:0}
  .car-arrows{min-width:0}
  .car-arrow{width:42px;height:42px}
  .about,.why{padding:64px 0}
  .psec{padding:56px 0}
  .feat-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .stats{padding:44px 0}
  .stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px 16px}
  .stat .num{font-size:36px}
  .cta h2{font-size:28px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{justify-content:center;text-align:center}
  .btn{height:52px;padding:0 26px;font-size:15px}
}

/* ============ 法律文档页（privacy / terms）============ */
.doc{padding:96px 0 104px}
.doc-card{background:#fff;border:1.5px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);padding:52px 60px}
.doc-head{margin-bottom:36px;padding-bottom:26px;border-bottom:1.5px solid var(--line)}
.doc-head .eyebrow{color:var(--t3);margin-bottom:16px}
.doc-head h1{font-size:32px;line-height:1.35;color:var(--t1);font-weight:700;margin-bottom:14px}
.doc-meta{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:14px;color:var(--t3)}
.doc-body h2{font-size:19px;color:var(--t1);margin:34px 0 12px;font-weight:700}
.doc-body h2:first-child{margin-top:0}
.doc-body p{margin-bottom:12px}
.doc-body strong{color:var(--t1)}
.doc-body ol,.doc-body ul{margin:0 0 12px 22px}
.doc-body li{margin-bottom:7px;padding-left:2px}
.doc-body table{width:100%;border-collapse:collapse;margin:4px 0 16px;font-size:15px}
.doc-body th,.doc-body td{border:1px solid var(--line-2);padding:10px 14px;text-align:left;vertical-align:top}
.doc-body th{background:var(--card-yellow);color:var(--t1);font-weight:600}
.doc-note{margin-top:36px;padding:16px 22px;background:var(--card-blue);border-radius:20px;font-size:14px;color:var(--t2)}
.doc-actions{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.doc-actions .btn{height:50px;font-size:15px;padding:0 28px}
@media (max-width:720px){
  .doc{padding:64px 0 72px}
  .doc-card{padding:34px 24px;border-radius:24px}
  .doc-head h1{font-size:26px}
}

/* ============ 下载页 ============ */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:8px}
.dl-card{background:var(--card-yellow);border:1.5px solid var(--line);border-radius:28px;padding:34px 32px}
.dl-card.dl-ios{background:var(--card-blue)}
.dl-card.dl-mp{background:var(--card-green);grid-column:1 / -1}
.dl-card h2{font-size:21px;color:var(--t1);margin:0 0 6px;font-weight:700}
.dl-card .dl-sub{font-size:14px;color:var(--t2);margin-bottom:20px}
.dl-card .btn{width:100%}
.dl-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--t3);margin-top:16px}
.dl-steps{margin:14px 0 0 20px;font-size:14px}
.dl-steps li{margin-bottom:6px}
.dl-badge{display:inline-block;font-size:12px;font-weight:600;color:var(--t1);background:#fff;border:1px solid var(--line-2);border-radius:999px;padding:3px 12px;margin-bottom:14px}
.dl-status{margin-top:14px;font-size:14px;color:var(--t1);font-weight:600;display:none}
.dl-status.show{display:block}
@media (max-width:720px){.dl-grid{grid-template-columns:1fr}}