/* ============================================================
   星创AI · 主页主题  「Editorial / 衬线高级感（亮色商业版）」
   参考 chenzijun 个人站 DNA：衬线大字 + 等宽标签 + 蓝光氛围
   ============================================================ */
@import url('fonts/fonts.css');  /* 本地托管拉丁字体；中文走系统字体 */

:root{
  --bg:#F7F4EE;            /* 暖象牙 */
  --bg-2:#FFFFFF;
  --bg-tint:#EEF2FF;       /* 蓝调浅底 */
  --paper:#FCFAF5;
  --ink:#16130E;          /* 暖墨黑 */
  --ink-2:#5F594D;
  --ink-3:#9b9486;
  --line:#E7E1D4;
  --line-2:#D8D1C0;
  --accent:#2456E6;       /* 靛蓝（呼应星衣坊APP）*/
  --accent-2:#5B8DEF;
  --accent-d:#1A3FB0;
  --accent-soft:#E7EEFF;
  --glow:rgba(36,86,230,.25);

  --serif:"Playfair Display",Georgia,"Songti SC","STSong","Noto Serif SC","Source Han Serif SC",SimSun,serif;
  --sans:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  --r:14px;--r-lg:22px;--r-xl:30px;
  --sh-sm:0 2px 10px rgba(40,32,12,.05);
  --sh:0 16px 40px -12px rgba(40,32,20,.14);
  --sh-lg:0 40px 80px -24px rgba(30,30,60,.22);
  --sh-glow:0 22px 50px -16px var(--glow);
  --maxw:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.serif{font-family:var(--serif)}
.mono{font-family:var(--mono)}

/* ambient glow */
.glowbg{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.glowbg span{position:absolute;border-radius:50%;filter:blur(110px);opacity:.5}
.glowbg .a{width:560px;height:560px;background:radial-gradient(circle,#aec4ff,transparent 70%);top:-200px;left:-120px;animation:drift 24s ease-in-out infinite}
.glowbg .b{width:480px;height:480px;background:radial-gradient(circle,#cdd9ff,transparent 70%);top:40%;right:-160px;animation:drift 30s ease-in-out infinite reverse}
@keyframes drift{0%,100%{transform:translate(0,0)}50%{transform:translate(36px,44px)}}

/* eyebrow label (mono) */
.eyebrow{font-family:var(--mono);font-size:12.5px;font-weight:500;letter-spacing:3px;text-transform:uppercase;color:var(--accent);display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent)}

/* nav */
nav{position:sticky;top:0;z-index:100;transition:.35s}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:var(--maxw);margin:14px auto 0;padding:0 14px 0 20px;border-radius:999px;background:rgba(252,250,245,.55);border:1px solid rgba(255,255,255,.6);backdrop-filter:blur(16px) saturate(150%);box-shadow:var(--sh-sm);transition:.35s}
nav.scrolled .nav{background:rgba(252,250,245,.92);box-shadow:var(--sh);margin-top:8px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:.3px}
.logo img{width:30px;height:30px}
.menu{display:flex;gap:30px;font-size:14.5px;color:var(--ink-2);font-weight:500}
.menu a{position:relative;transition:.18s}
.menu a::after{content:"";position:absolute;left:0;bottom:-6px;height:1.5px;width:0;background:var(--accent);transition:.25s}
.menu a:hover,.menu a.active{color:var(--ink)}
.menu a:hover::after,.menu a.active::after{width:100%}
.nav-cta{display:flex;gap:10px;align-items:center}
.menu-btn{display:none;font-size:24px;background:none;border:none;color:var(--ink);cursor:pointer}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;padding:12px 24px;border-radius:999px;font-family:var(--sans);font-size:14.5px;font-weight:600;cursor:pointer;transition:.22s cubic-bezier(.2,.7,.3,1);border:1px solid transparent;white-space:nowrap}
.btn i{font-size:18px}
.btn-fill{background:var(--accent);color:#fff}
.btn-fill:hover{background:var(--accent-d);transform:translateY(-2px);box-shadow:var(--sh-glow)}
.btn-line{border-color:var(--line-2);color:var(--ink);background:rgba(255,255,255,.5)}
.btn-line:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:#fff}.btn-dark:hover{transform:translateY(-2px);box-shadow:var(--sh)}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-block{width:100%;justify-content:center}
.auth-chip{display:inline-flex;align-items:center;gap:10px}
.auth-chip .auth-chip-name{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.auth-chip .auth-chip-tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  background:rgba(36,86,230,.10);color:var(--accent-d);font-size:12px;font-weight:700
}

/* sections */
section{padding:108px 0;position:relative}
.sec-head{max-width:720px;margin:0 auto 64px;text-align:center}
.sec-head h2{font-family:var(--serif);font-size:46px;font-weight:600;line-height:1.18;letter-spacing:-.5px;margin:18px 0 14px}
.sec-head h2 em{font-style:italic;color:var(--accent)}
.sec-head p{color:var(--ink-2);font-size:18px}
.tint{background:linear-gradient(180deg,#fff,var(--bg))}

/* hero */
.hero{padding:84px 0 70px;position:relative}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:56px;align-items:center}
.hero h1{font-family:var(--serif);font-size:72px;line-height:1.06;font-weight:600;letter-spacing:-1.5px;margin:22px 0 22px}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero .lead{font-size:19px;color:var(--ink-2);max-width:520px;margin-bottom:18px}
.hero .poem{font-family:var(--serif);font-style:italic;font-size:17px;color:var(--ink-3);margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{margin-top:30px;display:flex;gap:10px;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:12px;letter-spacing:.5px;color:var(--ink-2);background:rgba(255,255,255,.7);border:1px solid var(--line);padding:7px 13px;border-radius:999px}

/* ---- 星衣坊 APP mockup ---- */
.win{background:var(--bg-2);border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-lg);overflow:hidden;position:relative}
.win-bar{height:38px;display:flex;align-items:center;gap:8px;padding:0 14px;background:#eef1f6;border-bottom:1px solid #e2e6ee}
.win-bar .dots{display:flex;gap:6px}.win-bar .dots i{width:10px;height:10px;border-radius:50%;background:#cfd6e2}
.win-bar .t{font-family:var(--sans);font-size:12px;color:#5b6478;font-weight:600}
.app{padding:18px}
.app-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.app-top h4{font-family:var(--sans);font-size:17px;font-weight:700;color:#1b2a4a}
.app-top .pills{display:flex;gap:6px}
.app-top .pills b{font-family:var(--sans);font-size:10.5px;font-weight:600;padding:5px 10px;border-radius:999px;background:#eef2ff;color:#2456E6}
.app-top .pills b.on{background:#2456E6;color:#fff}
.app-card{border:1px solid #e6eaf2;border-radius:12px;padding:16px}
.app-step{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.app-step .n{width:26px;height:26px;border-radius:7px;background:#eef2ff;color:#2456E6;font-family:var(--mono);font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center}
.app-step h5{font-family:var(--sans);font-size:14px;font-weight:700;color:#1b2a4a}
.app-step p{font-family:var(--sans);font-size:11px;color:#8a93a6}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mode{border:1.5px solid #e6eaf2;border-radius:12px;padding:15px;background:#fbfcff}
.mode.sel{border-color:#2456E6;background:#f5f8ff}
.mode h6{font-family:var(--sans);font-size:15px;font-weight:700;color:#1b2a4a;margin-bottom:6px}
.mode p{font-family:var(--sans);font-size:11px;line-height:1.6;color:#7a8298;margin-bottom:14px;min-height:54px}
.mode .go{font-family:var(--sans);font-size:12px;font-weight:600;text-align:center;padding:9px;border-radius:8px;background:#2456E6;color:#fff}
.win-float{position:absolute;font-family:var(--mono);font-size:11px;font-weight:500;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 12px;box-shadow:var(--sh);display:flex;align-items:center;gap:7px}
.win-float i{color:var(--accent);font-size:15px}
.wf1{top:-14px;right:18px;animation:float 7s ease-in-out infinite}
.wf2{bottom:-16px;left:24px;animation:float 9s ease-in-out infinite .6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* feature cards */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;transition:.3s cubic-bezier(.2,.7,.3,1)}
.card:hover{transform:translateY(-7px);box-shadow:var(--sh-lg);border-color:transparent;background:#fff}
.card .num{font-family:var(--mono);font-size:12.5px;color:var(--accent);letter-spacing:1px}
.card .ic{width:52px;height:52px;border-radius:14px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:25px;margin:14px 0 16px}
.card h3{font-family:var(--serif);font-size:21px;font-weight:600;margin-bottom:8px}
.card p{color:var(--ink-2);font-size:14.5px}
.card .tagline{display:inline-block;font-family:var(--mono);font-size:11px;color:var(--accent-d);background:var(--accent-soft);padding:3px 10px;border-radius:999px;margin-bottom:10px}

/* mode showcase (爆款复刻/服装带货) */
.mode-show{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.mode-big{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:36px;transition:.3s;position:relative;overflow:hidden}
.mode-big:hover{box-shadow:var(--sh-lg);transform:translateY(-5px)}
.mode-big .k{font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:1px}
.mode-big h3{font-family:var(--serif);font-size:28px;font-weight:600;margin:10px 0 12px}
.mode-big p{color:var(--ink-2);font-size:15px;margin-bottom:18px}
.mode-big ul{list-style:none}
.mode-big li{display:flex;gap:10px;align-items:center;font-size:14px;padding:6px 0;color:var(--ink)}
.mode-big li i{color:var(--accent);font-size:18px}

/* video orbit carousel */
.video-carousel{display:flex;flex-direction:column;gap:14px}
.video-data{display:none}
.video-orbit{display:grid;grid-template-columns:.78fr 1.12fr 1.9fr 1.12fr .78fr;gap:16px;align-items:end;min-height:710px;padding:18px 0 24px}
.orbit-main{align-self:stretch;display:flex;flex-direction:column;justify-content:space-between;gap:14px;padding:22px 22px 16px;border-radius:30px;background:
  radial-gradient(circle at 50% 0,rgba(114,177,224,.22),transparent 42%),
  linear-gradient(180deg,#f7fbff,#edf4fb 80%,#edf2f7);
  border:1px solid rgba(122,155,192,.22);box-shadow:0 28px 60px rgba(11,20,55,.12)}
.orbit-main-copy{padding:0 4px}
.orbit-main-copy h3{font-family:var(--serif);font-size:38px;line-height:1.04;font-weight:600;letter-spacing:-.8px;margin:4px 0 0}
.orbit-main-screen{position:relative;border-radius:24px;overflow:hidden;aspect-ratio:9/16;background:#0b1322;border:1px solid rgba(8,16,31,.08);box-shadow:0 22px 50px rgba(11,20,55,.18)}
.orbit-main-screen::after{content:"";position:absolute;inset:auto 0 0 0;height:120px;background:linear-gradient(180deg,transparent,rgba(6,11,21,.22));pointer-events:none}
.orbit-main-screen video{width:100%;height:100%;display:block;object-fit:cover;background:#0b1322}
.orbit-card{appearance:none;position:relative;border:none;padding:0;cursor:pointer;border-radius:28px;overflow:hidden;background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(229,237,247,.92));border:1px solid rgba(128,150,182,.22);box-shadow:0 18px 36px rgba(11,20,55,.1);transition:transform .26s ease, box-shadow .26s ease, border-color .26s ease, opacity .26s ease}
.orbit-card::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.18),rgba(9,16,31,.14));pointer-events:none}
.orbit-card::after{content:"";position:absolute;left:0;right:0;bottom:0;height:108px;background:linear-gradient(180deg,transparent,rgba(9,16,31,.6));pointer-events:none}
.orbit-card:hover,.orbit-card:focus-visible{transform:translateY(-10px);box-shadow:0 24px 46px rgba(11,20,55,.16)}
.orbit-card:focus-visible{outline:2px solid rgba(36,86,230,.26);outline-offset:4px}
.orbit-card.is-selected{transform:translateY(-14px);border-color:rgba(36,86,230,.32);box-shadow:0 28px 52px rgba(36,86,230,.16)}
.orbit-card video,.orbit-card img{width:100%;height:100%;display:block;object-fit:cover;background:#dfe7f2}
.orbit-card-outer-left,.orbit-card-outer-right{height:286px}
.orbit-card-inner-left,.orbit-card-inner-right{height:436px}
.orbit-card-title{position:absolute;left:16px;right:16px;bottom:42px;color:#fff;font-size:15px;font-weight:600;z-index:1;text-align:center;letter-spacing:.2px}
.orbit-card-tag{position:absolute;left:14px;top:14px;font-family:var(--mono);font-size:10.5px;color:var(--accent-d);background:rgba(255,255,255,.92);padding:5px 10px;border-radius:999px;z-index:1}
.orbit-card-order{position:absolute;top:14px;right:14px;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.92);font-family:var(--mono);font-size:10px;color:#6a7996;z-index:1}
.orbit-dots{display:flex;justify-content:center;gap:8px}
.orbit-dots button{width:9px;height:9px;border-radius:50%;border:none;background:#c7d4ea;padding:0;cursor:pointer;transition:transform .2s ease, background .2s ease}
.orbit-dots button.is-active{background:var(--accent);transform:scale(1.2)}
.dev-hero-art{display:flex;justify-content:center;align-items:center;width:min(56vw,1040px);min-height:560px;margin-left:74px}
.dev-hero-img{width:min(62vw,1180px);max-width:none;transform:translateX(108px) scale(1.18);transform-origin:center right}

/* steps timeline */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.tstep{position:relative;padding-top:30px}
.tstep::before{content:"";position:absolute;top:6px;left:0;right:0;height:2px;background:var(--line)}
.tstep .d{position:absolute;top:0;left:0;width:14px;height:14px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}
.tstep .k{font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:1px}
.tstep h4{font-family:var(--serif);font-size:20px;font-weight:600;margin:8px 0 6px}
.tstep p{color:var(--ink-2);font-size:14px}

/* dev case grid */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:.25s;display:flex;flex-direction:column;gap:8px}
.case:hover{transform:translateY(-5px);box-shadow:var(--sh);background:#fff;border-color:transparent}
.case .ci{width:42px;height:42px;border-radius:11px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:21px}
.case h4{font-size:15.5px;font-weight:600;font-family:var(--sans)}
.case p{font-size:13px;color:var(--ink-2)}
.case.feat{background:var(--ink);color:#fff;border-color:transparent}
.case.feat .ci{background:rgba(255,255,255,.12);color:#9fc0ff}
.case.feat p{color:#b9c0d6}
.case.feat a{color:#9fc0ff;font-family:var(--mono);font-size:12.5px;display:inline-flex;align-items:center;gap:6px;margin-top:4px}

/* policy pages */
.policy-block{padding-bottom:14px;margin-bottom:20px;border-bottom:1px solid rgba(231,225,212,.72)}
.policy-block:last-of-type{border-bottom:none}
.policy-block h2{font-family:var(--serif);font-size:31px;line-height:1.16;font-weight:600;letter-spacing:-.3px;margin-bottom:18px}
.policy-block h3{font-size:17px;font-weight:700;color:var(--ink);margin:20px 0 10px}
.policy-block p{font-size:15.5px;line-height:1.9;color:var(--ink-2);margin-bottom:12px}
.policy-block ul{margin:10px 0 14px 18px;color:var(--ink-2)}
.policy-block li{margin-bottom:8px;padding-left:2px}
.policy-note{margin:16px 0 18px;padding:16px 18px;border-radius:18px;border:1px solid rgba(36,86,230,.14);background:rgba(231,238,255,.7)}
.policy-note p:last-child,.policy-note ul:last-child{margin-bottom:0}
.policy-note-warn{border-color:rgba(210,84,53,.18);background:rgba(255,239,235,.88)}

/* stat band */
.band{background:var(--ink);border-radius:var(--r-xl);padding:56px 44px;color:#fff;position:relative;overflow:hidden}
.band::before{content:"";position:absolute;width:420px;height:420px;background:radial-gradient(circle,rgba(91,141,239,.5),transparent 70%);top:-160px;right:-80px}
.band .statgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;position:relative}
.band .n{font-family:var(--serif);font-size:50px;font-weight:600;color:#fff}
.band .l{color:#aab4d6;font-size:14.5px;margin-top:4px}

/* about founder */
.about{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:center}
.about .ava{aspect-ratio:1;border-radius:var(--r-xl);background:linear-gradient(135deg,#2456E6,#7AA0FF);display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--serif);font-size:84px;box-shadow:var(--sh-lg);position:relative;overflow:hidden}
.about .ava::after{content:"";position:absolute;width:200px;height:200px;background:radial-gradient(circle,rgba(255,255,255,.35),transparent 70%);top:-40px;right:-40px}
.about h2{font-family:var(--serif);font-size:40px;font-weight:600;letter-spacing:-.5px;margin:16px 0 16px;line-height:1.2}
.about p{color:var(--ink-2);font-size:16px;margin-bottom:14px}

/* CTA */
.cta-box{background:var(--ink);border-radius:var(--r-xl);text-align:center;padding:80px 28px;color:#fff;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 0,rgba(91,141,239,.5),transparent 55%),radial-gradient(circle at 80% 100%,rgba(36,86,230,.45),transparent 55%)}
.cta-box>*{position:relative}
.cta-box h2{font-family:var(--serif);font-size:44px;font-weight:600;letter-spacing:-.5px;margin-bottom:16px}
.cta-box p{color:#bcc4e0;font-size:17px;margin-bottom:30px}
.cta-box .btn-fill{background:#fff;color:var(--accent-d)}

/* footer */
footer{background:var(--ink);color:#aab4d6;padding:70px 0 30px}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;margin-bottom:38px}
.foot .logo{color:#fff}
.foot h5{color:#fff;margin-bottom:14px;font-size:14.5px;font-family:var(--sans);font-weight:600}
.foot a{display:block;margin-bottom:9px;color:#9aa3c4;font-size:14px}
.foot a:hover{color:#fff}
.beian{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding-top:24px;font-size:13px;color:#7d86a6}
.beian a{color:#9aa3c4}

/* ---- 痛点对比 ---- */
.pain{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pain .col{border-radius:var(--r-lg);padding:30px}
.pain .bad{background:#fbeeec;border:1px solid #f3d6d0}
.pain .good{background:var(--accent-soft);border:1px solid #cfe0ff}
.pain h4{font-family:var(--sans);font-size:15px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.pain .bad h4{color:#b3402e}.pain .good h4{color:var(--accent-d)}
.pain ul{list-style:none}
.pain li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;padding:8px 0;color:var(--ink)}
.pain .bad li i{color:#d8593f}.pain .good li i{color:var(--accent)}

/* ---- 联系/二维码 ---- */
.contact{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:center}
.contact h2{font-family:var(--serif);font-size:38px;font-weight:600;letter-spacing:-.5px;margin-bottom:14px;line-height:1.2}
.contact h2 em{font-style:italic;color:var(--accent)}
.contact p{color:var(--ink-2);font-size:16px;margin-bottom:14px}
.contact .ways{list-style:none;margin-top:18px}
.contact .ways li{display:flex;align-items:center;gap:12px;font-size:15px;padding:8px 0}
.contact .ways i{color:var(--accent);font-size:20px;width:24px}
.qr-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);padding:26px;text-align:center;box-shadow:var(--sh-lg);max-width:300px;margin:0 auto}
.qr-card .qrimg{width:230px;height:230px;object-fit:contain;margin:0 auto;border-radius:14px;background:var(--bg-tint);display:block}
.qr-card .nm{font-weight:600;margin-top:14px;font-size:16px}
.qr-card .rl{font-family:var(--mono);font-size:11.5px;color:var(--ink-3);letter-spacing:.3px}
.qr-card .note{margin-top:14px;font-size:13px;color:var(--accent-d);background:var(--accent-soft);border-radius:10px;padding:10px 12px;line-height:1.5}
.qr-card .note b{font-weight:700}
@media(max-width:820px){.contact{grid-template-columns:1fr;gap:28px}.pain{grid-template-columns:1fr}}

/* ---- FAQ ---- */
.faq{max-width:780px;margin:0 auto}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:2px 22px;margin-bottom:12px;transition:.2s}
.faq details[open]{box-shadow:var(--sh)}
.faq summary{cursor:pointer;font-weight:600;padding:18px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:24px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"\2013"}
.faq .a{color:var(--ink-2);font-size:14.5px;padding:0 0 18px;line-height:1.75}

/* ---- 羽化图（四边渐隐融入背景） ---- */
.feather-img{width:100%;display:block;
  -webkit-mask-image:linear-gradient(to right,transparent,#000 9%,#000 91%,transparent),linear-gradient(to bottom,transparent,#000 8%,#000 92%,transparent);
  -webkit-mask-composite:source-in;
  mask-image:linear-gradient(to right,transparent,#000 9%,#000 91%,transparent),linear-gradient(to bottom,transparent,#000 8%,#000 92%,transparent);
  mask-composite:intersect}

/* ---- showcase 横幅 ---- */
.showcase{margin:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-lg);position:relative}
.showcase img{width:100%;display:block}
.showcase figcaption{position:absolute;left:16px;bottom:14px;font-family:var(--mono);font-size:11.5px;letter-spacing:.3px;color:#fff;background:rgba(11,20,55,.45);backdrop-filter:blur(4px);padding:6px 12px;border-radius:999px}

/* ---- testimonials 客户评价 ---- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.quote{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;transition:.3s cubic-bezier(.2,.7,.3,1);display:flex;flex-direction:column;position:relative}
.quote::before{content:"\201C";position:absolute;top:10px;right:22px;font-family:var(--serif);font-size:64px;line-height:1;color:var(--accent);opacity:.14}
.quote:hover{transform:translateY(-6px);box-shadow:var(--sh-lg);background:#fff;border-color:transparent}
.quote .stars{color:#f5a623;font-size:14px;letter-spacing:3px;margin-bottom:14px}
.quote .qt{font-family:var(--serif);font-size:16.5px;line-height:1.75;color:var(--ink);margin-bottom:22px;flex:1}
.quote .who{display:flex;align-items:center;gap:12px}
.quote .av{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#2456E6,#7AA0FF);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;flex-shrink:0}
.quote .nm{font-size:14.5px;font-weight:600}
.quote .rl{font-family:var(--mono);font-size:11px;color:var(--ink-3);letter-spacing:.3px}
@media(max-width:960px){.quotes{grid-template-columns:1fr}}

/* ---- auth (登录/注册) ---- */
.auth-split{display:grid;grid-template-columns:1.05fr 1fr;min-height:100vh}
.auth-side{background:var(--ink);color:#fff;padding:56px 54px;position:relative;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between}
.auth-side::before{content:"";position:absolute;width:520px;height:520px;background:radial-gradient(circle,rgba(91,141,239,.45),transparent 70%);top:-180px;right:-120px}
.auth-side::after{content:"";position:absolute;width:380px;height:380px;background:radial-gradient(circle,rgba(36,86,230,.4),transparent 70%);bottom:-140px;left:-100px}
.auth-side>*{position:relative;z-index:1}
.auth-side .logo{color:#fff}
.auth-side .big{font-family:var(--serif);font-size:40px;font-weight:600;line-height:1.2;letter-spacing:-.5px;margin:0 0 16px}
.auth-side .big em{font-style:italic;color:#9fc0ff}
.auth-side .ticks{list-style:none;margin-top:8px}
.auth-side .ticks li{display:flex;align-items:center;gap:11px;color:#c3cbe6;font-size:15px;padding:7px 0}
.auth-side .ticks li i{color:#9fc0ff;font-size:19px}
.auth-side .copy{font-size:12.5px;color:#7d86a6}
.auth-main{display:flex;align-items:center;justify-content:center;padding:48px 28px;background:var(--bg)}
.auth-card{width:100%;max-width:400px}
.auth-card .eyebrow{justify-content:flex-start;margin-bottom:14px}
.auth-card h2{font-family:var(--serif);font-size:32px;font-weight:600;letter-spacing:-.4px;margin-bottom:8px}
.auth-card .sub{color:var(--ink-2);font-size:14.5px;margin-bottom:28px}
.field{margin-bottom:18px}
.field label{display:block;font-family:var(--mono);font-size:11.5px;letter-spacing:.5px;text-transform:uppercase;color:var(--ink-2);margin-bottom:8px}
.input{width:100%;height:48px;padding:0 16px;border:1px solid var(--line-2);border-radius:12px;font-family:var(--sans);font-size:15px;color:var(--ink);background:#fff;transition:.16s}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(36,86,230,.13)}
.input-row{display:flex;gap:10px}
.muted{color:var(--ink-2);font-size:13.5px}
.divider{text-align:center;color:var(--ink-3);font-size:12.5px;margin:22px 0;position:relative}
.divider::before,.divider::after{content:"";position:absolute;top:50%;width:40%;height:1px;background:var(--line-2)}
.divider::before{left:0}.divider::after{right:0}
.pwd-wrap{position:relative}
.pwd-wrap .eye{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--ink-3);cursor:pointer;display:flex;padding:4px}
.cap-row,.code-row{display:flex;gap:10px}
.cap-img{height:48px;width:120px;flex-shrink:0;border:1px solid var(--line-2);border-radius:12px;cursor:pointer;object-fit:cover;background:var(--bg-tint)}
.btn-code{white-space:nowrap;min-width:124px}
.btn-code:disabled{opacity:.55;cursor:not-allowed}
.form-err{color:#dc2626;font-size:13px;margin:2px 0 14px;display:none}
.form-ok{color:#16a34a;font-size:13px;margin:2px 0 14px;display:none}
.hint{font-family:var(--mono);font-size:11px;color:var(--ink-3);margin-top:7px;letter-spacing:.3px}
@media(max-width:820px){.auth-split{grid-template-columns:1fr}.auth-side{display:none}}

/* reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s cubic-bezier(.2,.7,.3,1),transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media(max-width:960px){
  .hero-grid,.about{grid-template-columns:1fr}
  .grid,.grid-4,.mode-show,.cases{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .video-orbit{grid-template-columns:1fr;min-height:auto;padding:10px 0}
  .orbit-card{display:none}
  .orbit-main{order:1}
  .orbit-main-copy h3{font-size:32px}
  .dev-hero-art{justify-content:center;width:100%;min-height:auto;margin-left:0}
  .dev-hero-img{width:min(100%,760px);transform:none}
  .steps{grid-template-columns:1fr 1fr;gap:30px 22px}
  .band .statgrid{grid-template-columns:1fr 1fr;gap:30px 20px}
  .hero h1{font-size:48px}.sec-head h2{font-size:34px}.cta-box h2{font-size:32px}
  .menu,.nav-cta .btn-line{display:none}.menu-btn{display:block}
  section{padding:76px 0}
}
@media(max-width:720px){
  .orbit-main{padding:18px}
  .orbit-main-screen{aspect-ratio:9/16}
  .policy-block h2{font-size:26px}
}
@media(max-width:520px){
  .hero h1{font-size:38px}
  .orbit-main-copy h3{font-size:28px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto}.reveal{opacity:1;transform:none}}

/* mode/clip color fills for effect wall (no external images) */
.ph-1{background:linear-gradient(150deg,#cdd9ff,#7AA0FF 60%,#2456E6)}
.ph-2{background:linear-gradient(150deg,#ffd9e6,#ff9bbf 55%,#c2477e)}
.ph-3{background:linear-gradient(150deg,#d6f0e4,#74c8a4 55%,#1f8f6b)}
.ph-4{background:linear-gradient(150deg,#ffe6c2,#ffb86b 55%,#d97a17)}
.ph-5{background:linear-gradient(150deg,#e6dcff,#b79bff 55%,#6d40d8)}
.ph-6{background:linear-gradient(150deg,#cfe9ff,#7ab8ff 55%,#2a7ad8)}
.ph-7{background:linear-gradient(150deg,#ffd6d0,#ff9b8e 55%,#d8503c)}
.ph-8{background:linear-gradient(150deg,#dde3ee,#aab6cc 55%,#5b6a86)}