/* ============ 基础 ============ */
:root{
  --bg:#f6f7fa;
  --surface:#ffffff;
  --ink:#0b1020;
  --muted:#5b6478;
  --line:#e7ebf3;
  --indigo:#ff3b6b;
  --violet:#ff5e8a;
  --cyan:#ff8a5b;
  --grad:linear-gradient(120deg,#ff2d6b 0%,#ff5e8a 50%,#ff8a5b 100%);
  --grad-soft:linear-gradient(120deg,rgba(255,45,107,.12),rgba(255,138,91,.12));
  --shadow:0 18px 50px -24px rgba(15,23,42,.28);
  --shadow-lg:0 30px 70px -30px rgba(15,23,42,.40);
  --r:18px;
  --r-lg:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.2;font-weight:900;letter-spacing:-.01em}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.container--narrow{max-width:840px}
.kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--indigo);margin-bottom:14px;
  padding:6px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);
}
.section{padding:96px 0}
.section--alt{background:linear-gradient(180deg,#eef1f8,#f4f6fb)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  font-weight:700;font-size:15px;padding:12px 22px;border-radius:999px;
  border:1px solid transparent;cursor:pointer;transition:.25s ease;white-space:nowrap;
}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px -12px rgba(255,45,107,.7)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px -12px rgba(255,45,107,.8)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--indigo);color:var(--indigo);transform:translateY(-2px)}
.btn--lg{padding:15px 30px;font-size:16px}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--block{display:flex;width:100%}
.btn__arrow{transition:transform .25s}
.btn:hover .btn__arrow{transform:translateX(4px)}

/* ============ 导航 ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s;
  background:rgba(255,255,255,.86);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav.is-scrolled{background:rgba(255,255,255,.94);box-shadow:0 6px 24px -16px rgba(15,23,42,.4)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900}
.brand__mark{
  display:flex;align-items:center;justify-content:center;
  background:transparent;border-radius:0;box-shadow:none;
}
.brand__mark img{display:block;width:auto;height:38px;object-fit:contain}

.brand__name i{font-style:normal;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.04em}
.brand__name {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    font-size: 17px;
    color: var(--ink);
}
.brand__main {
    /* 内部文字横向一行 */
}
.brand__sub {
    font-size: 14px; /* 可选：副标题调小一点，按需删除 */
    opacity: 0.8;   /* 可选：弱化副标题 */
}

.nav__links{display:flex;gap:30px}
.nav__links a{font-size:15px;font-weight:500;color:var(--ink);position:relative;padding:6px 0}
.nav__links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad);transition:.25s}
.nav__links a:hover{color:var(--indigo)}
.nav__links a:hover::after{width:100%}
.nav__actions{display:flex;align-items:center;gap:12px}
.nav .btn--ghost{color:var(--ink);border-color:var(--line)}
.nav .btn--ghost:hover{border-color:var(--indigo);color:var(--indigo);background:transparent}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ============ HERO ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;
  background:radial-gradient(120% 120% at 80% 0%,#1b2150 0%,#0b1020 55%,#070a16 100%);
  color:#fff;overflow:hidden;padding:120px 0 80px}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.hero__veil{position:absolute;inset:0;z-index:2;
  background:radial-gradient(60% 80% at 18% 50%,rgba(7,10,22,.85),transparent 70%),
             linear-gradient(90deg,rgba(7,10,22,.6),transparent 55%)}
.hero__inner{position:relative;z-index:3;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;width:100%}
.hero__eyebrow{display:inline-block;font-size:13px;letter-spacing:.1em;color:#aab2e6;
  border:1px solid rgba(255,255,255,.18);padding:7px 14px;border-radius:999px;margin-bottom:22px;background:rgba(255,255,255,.04)}
.hero__title{font-size:clamp(38px,5.4vw,68px);font-weight:900;letter-spacing:-.02em;margin-bottom:22px}
.hero__sub{font-size:18px;color:#c4cbe8;max-width:560px;margin-bottom:30px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.hero__cta .btn--ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.hero__cta .btn--ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.hero__badges{list-style:none;display:flex;gap:30px;flex-wrap:wrap}
.hero__badges li{display:flex;flex-direction:column}
.hero__badges strong{font-size:30px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__badges span{font-size:13px;color:#9aa3ce}
/* 首屏装饰：网格 + 光晕 */
.hero::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1.4px);background-size:28px 28px;
  -webkit-mask:radial-gradient(130% 100% at 50% 0%,#000,transparent 78%);mask:radial-gradient(130% 100% at 50% 0%,#000,transparent 78%)}
.hero__visual{position:relative;height:480px}
.hero__scroll{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:8px;font-size:12px;color:#9aa3ce;letter-spacing:.1em}
.hero__scroll span{width:1px;height:34px;background:linear-gradient(#9aa3ce,transparent);animation:scrolld 1.8s infinite}
@keyframes scrolld{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ============ 信任条 ============ */
.trust{padding:30px 0;background:var(--surface);border-bottom:1px solid var(--line)}
.trust__label{text-align:center;font-size:13px;color:var(--muted);margin-bottom:16px;letter-spacing:.04em}
.trust__row{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.trust__row span{font-size:14px;font-weight:500;color:var(--ink);padding:8px 16px;border:1px solid var(--line);border-radius:999px;background:#fafbff;transition:.2s}
.trust__row span:hover{color:var(--indigo);border-color:var(--indigo);transform:translateY(-2px)}

/* ============ 区块标题 ============ */
.section__head{max-width:720px;margin:0 auto 54px;text-align:center}
.section__title{font-size:clamp(28px,3.6vw,44px);margin-bottom:14px}
.section__lead{color:var(--muted);font-size:17px}

/* ============ 网格 ============ */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}

/* ============ 卡片 ============ */
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card:hover::before{opacity:1}
.card__preview{height:152px;border-radius:14px;background:linear-gradient(135deg,rgba(255,45,107,.07),rgba(255,138,91,.07));
  border:1px solid var(--line);margin-bottom:16px;overflow:hidden;display:block}
.card__preview svg{display:block;width:100%;height:100%}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card__more{display:inline-block;margin-top:14px;font-weight:700;color:var(--indigo);font-size:14px}
.card--combo{background:linear-gradient(160deg,#fff,#f3f1ff);border-color:#e3ddff}
.card--combo .btn{margin-top:14px}

/* ============ 标签页 ============ */
.tabs{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden}
.tabs__nav{display:flex;flex-wrap:wrap;gap:8px;padding:14px;border-bottom:1px solid var(--line);background:#fafbff}
.tab{font-size:15px;font-weight:600;color:var(--muted);background:transparent;border:1px solid transparent;
  padding:10px 18px;border-radius:999px;cursor:pointer;transition:.2s}
.tab:hover{color:var(--indigo)}
.tab.is-active{color:#fff;background:var(--grad);box-shadow:0 10px 22px -12px rgba(255,45,107,.7)}
.tabpane{display:none;padding:40px;gap:36px;align-items:center;grid-template-columns:240px 1fr}
.tabpane.is-active{display:grid}
.tabpane__media{width:240px;height:200px;border-radius:18px;display:block;overflow:hidden;
  background:linear-gradient(135deg,rgba(255,45,107,.07),rgba(255,138,91,.07));border:1px solid var(--line);justify-self:center}
.tabpane__media svg{display:block;width:100%;height:100%}
.tabpane__text h3{font-size:26px;margin-bottom:10px}
.tabpane__text>p{color:var(--muted);margin-bottom:18px}
.chk{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 22px}
.chk li{position:relative;padding-left:24px;font-size:15px;color:var(--ink)}
.chk li::before{content:"✓";position:absolute;left:0;top:0;color:#fff;background:var(--grad);
  width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700}

/* ============ 技术栈 ============ */
.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.logo{display:grid;place-items:center;text-align:center;padding:22px 10px;border:1px solid var(--line);
  border-radius:14px;background:var(--surface);font-weight:600;font-size:14px;color:var(--ink);
  box-shadow:var(--shadow);transition:.25s}
.logo:hover{transform:translateY(-4px);color:var(--indigo);border-color:var(--indigo)}

/* ============ 案例 ============ */
.case{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case__thumb{height:170px;display:grid;place-items:center;color:#fff;font-weight:700;letter-spacing:.04em;
  position:relative;overflow:hidden}
.case__thumb span{position:relative;z-index:2;font-size:18px}
.case__thumb::after{content:"";position:absolute;inset:0;background:rgba(7,10,22,.18);z-index:1}
.case__thumb--a{background:linear-gradient(135deg,#ff2d6b,#ff5e8a)}
.case__thumb--b{background:linear-gradient(135deg,#ff7e5f,#ff8a5b)}
.case__thumb--c{background:linear-gradient(135deg,#f59e0b,#ef4444)}
.case__thumb--d{background:linear-gradient(135deg,#10b981,#059669)}
.case__thumb--e{background:linear-gradient(135deg,#ff5e8a,#ff8a5b)}
.case__thumb--f{background:linear-gradient(135deg,#ff2d6b,#ff8a5b)}
.case__body{padding:22px}
.case__body h3{font-size:17px;margin-bottom:8px}
.case__body p{color:var(--muted);font-size:14px;margin-bottom:14px}
.case__metric{display:flex;align-items:baseline;gap:8px;border-top:1px solid var(--line);padding-top:14px}
.case__metric b{font-size:24px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.case__metric i{font-style:normal;font-size:13px;color:var(--muted)}

/* ============ 时间线 ============ */
.timeline{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.timeline::before{content:"";position:absolute;top:30px;left:8%;right:8%;height:2px;
  background:linear-gradient(90deg,#ff2d6b,#ff5e8a,#ff8a5b);opacity:.4}
.timeline__item{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 22px;box-shadow:var(--shadow)}
.timeline__no{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:13px;
  background:var(--grad);color:#fff;font-weight:900;font-size:18px;margin-bottom:14px;box-shadow:0 10px 22px -10px rgba(255,45,107,.8)}
.timeline__item h3{font-size:18px;margin-bottom:8px}
.timeline__item p{color:var(--muted);font-size:14px}

/* ============ 数据条 ============ */
.stats{background:radial-gradient(120% 140% at 50% 0%,#1b2150,#0b1020);color:#fff;padding:64px 0}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat b{display:block;font-size:clamp(36px,5vw,58px);font-weight:900;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat i{font-style:normal;color:#aab2e6;font-size:14px;letter-spacing:.04em}

/* ============ 评价 ============ */
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px;
  box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.quote:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.quote blockquote{font-size:16px;color:var(--ink);margin-bottom:18px;position:relative}
.quote blockquote::before{content:"“";font-size:46px;color:var(--indigo);opacity:.25;position:absolute;top:-18px;left:-6px;font-family:Georgia,serif}
.quote figcaption{display:flex;align-items:center;gap:12px}
.quote__avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700}
.quote figcaption b{display:block;font-size:15px}
.quote figcaption i{font-style:normal;font-size:13px;color:var(--muted)}

/* ============ 方案 ============ */
.plans{align-items:stretch}
.plan{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.plan:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.plan--hot{border-color:transparent;background:linear-gradient(180deg,#fff,#f3f1ff);box-shadow:0 30px 70px -30px rgba(124,58,237,.55)}
.plan--hot::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1.5px;background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.plan__flag{position:absolute;top:18px;right:18px;background:var(--grad);color:#fff;font-size:12px;font-weight:700;
  padding:5px 12px;border-radius:999px}
.plan__name{font-size:24px;margin-bottom:6px}
.plan__desc{color:var(--muted);font-size:14px;margin-bottom:16px;min-height:40px}
.plan__price{font-size:30px;font-weight:900;margin-bottom:18px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.plan__list{list-style:none;flex:1;margin-bottom:22px;display:grid;gap:10px}
.plan__list li{position:relative;padding-left:24px;font-size:14px;color:var(--ink)}
.plan__list li::before{content:"✓";position:absolute;left:0;top:0;color:#fff;background:var(--grad);width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700}

/* ============ FAQ ============ */
.faq{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);overflow:hidden;box-shadow:var(--shadow)}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item:last-child{border-bottom:0}
.faq__q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  background:none;border:0;cursor:pointer;text-align:left;padding:22px 26px;font-size:17px;font-weight:700;color:var(--ink)}
.faq__ic{font-size:24px;color:var(--indigo);transition:transform .3s;flex-shrink:0}
.faq__item.is-open .faq__ic{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq__a p{padding:0 26px 22px;color:var(--muted);font-size:15px}

/* ============ CTA ============ */
.cta{padding:60px 0;background:radial-gradient(120% 120% at 50% 0%,#1b2150,#34394a);color:#fff}
.cta__inner{text-align:center;max-width:760px;margin:0 auto}
.cta h2{font-size:clamp(28px,4vw,46px);margin-bottom:14px}
.cta p{color:#c4cbe8;font-size:17px;margin-bottom:20px}
.cta__form{display:grid;grid-template-columns:1fr 1fr 1.4fr auto;gap:12px}
.cta__form input{padding:15px 18px;border-radius:14px;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;font-size:15px;outline:none;transition:.2s}
.cta__form input::placeholder{color:#9aa3ce}
.cta__form input:focus{border-color:var(--cyan);background:rgba(255,255,255,.1)}
.cta__hint{margin-top:16px;font-size:14px;min-height:20px;color:#9ae6c4}

/* ============ 页脚 ============ */
.footer{background:#070a16;color:#c4cbe8;padding:64px 0 28px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer__brand .brand__name{color:#fff}
.footer__brand p{margin-top:16px;font-size:14px;color:#8b93bd;max-width:300px}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer__col a{display:block;font-size:14px;color:#8b93bd;padding:6px 0;transition:.2s}
.footer__col a:hover{color:#fff}
.footer__muted{display:block;font-size:13px;color:#5b648f;padding:6px 0}
.footer__bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:40px;
  padding-top:22px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#5b648f}

/* ============ 加载遮罩 ============ */
.loader{position:fixed;inset:0;z-index:200;background:#070a16;display:grid;place-items:center;gap:18px;
  transition:opacity .6s,visibility .6s}
.loader.is-hidden{opacity:0;visibility:hidden}
.loader__ring{width:46px;height:46px;border-radius:50%;border:3px solid rgba(255,255,255,.15);border-top-color:#ff5e8a;animation:spin .9s linear infinite}
.loader__text{color:#fff;letter-spacing:.3em;font-size:14px;font-weight:700}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ 滚动揭示 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:20px}
  .hero__visual{height:auto;order:-1;margin-top:10px}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .logos{grid-template-columns:repeat(4,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .timeline::before{display:none}
  .footer__grid{grid-template-columns:1fr 1fr}
  .cta__form{grid-template-columns:1fr 1fr}
  .cta__form .btn--lg{grid-column:1/-1}
}
@media(max-width:680px){
  .nav__links{position:fixed;top:72px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(255,255,255,.96);backdrop-filter:blur(14px);padding:8px 24px 20px;
    border-bottom:1px solid var(--line);transform:translateY(-120%);transition:.35s;box-shadow:var(--shadow)}
  .nav__links.is-open{transform:none}
  .nav__links a{padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink)}
  .nav__links a:hover{color:var(--indigo)}
  .nav__links a:last-child{border-bottom:0}
  .nav__toggle{display:flex}
  .nav.is-open .nav__toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.is-open .nav__toggle span:nth-child(2){opacity:0}
  .nav.is-open .nav__toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav__actions .btn--ghost{display:none}
  .section{padding:72px 0}
  .grid--3{grid-template-columns:1fr}
  .logos{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:1fr}
  .tabpane.is-active{grid-template-columns:1fr;text-align:center}
  .tabpane__text{text-align:left}
  .chk{grid-template-columns:1fr}
  .stats__grid{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr}
  .cta__form{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .hero__scroll span{animation:none}
}