/* ===================================================================
   Nexio 课程表 · 官网样式（index / privacy / license 三页共用）
   设计语言：课表网格（骨架）× 液态玻璃（材质）× 红笔批注（语气）
   =================================================================== */

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

/* ==================== 令牌 ==================== */
:root{
  color-scheme:light;

  --sans:-apple-system,BlinkMacSystemFont,"SF Pro SC","SF Pro Text","PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei",system-ui,sans-serif;
  --latin:"Bricolage Grotesque","Avenir Next","SF Pro Display",var(--sans);
  /* 兼容法务页内联样式 */
  --font:var(--sans);
  --font-display:var(--latin);

  /* 底色：淡蓝雾面 */
  --bg:#e9eff8;
  --bg-2:#dfe8f4;
  --ink:#0d1422;
  --ink-2:#48556b;
  --ink-3:#78859b;

  /* 语气色：红笔 */
  --accent:#b2431a;
  --accent-deep:#8f3609;
  --accent-soft:rgba(178,67,26,.08);
  --accent-line:rgba(178,67,26,.26);
  --btn-bg:#b2431a;
  --btn-ink:#fffaf6;

  /* 品牌渐变（只用于图标与极少量装饰） */
  --b1:#f97316;
  --b2:#ec4899;
  --b3:#8b5cf6;

  /* 玻璃 */
  --glass:rgba(255,255,255,.58);
  --glass-2:rgba(255,255,255,.74);
  --glass-3:rgba(255,255,255,.9);
  --stroke:rgba(14,26,48,.10);
  --stroke-strong:rgba(14,26,48,.18);
  --edge:inset 0 1px 0 rgba(255,255,255,.85);
  --glow:0 0 0 1px rgba(178,67,26,.22),0 10px 26px -12px rgba(178,67,26,.35);
  --ring:rgba(14,26,48,.06);
  --hairline:rgba(14,26,48,.10);
  --grid-line:rgba(14,26,48,.055);
  --nav-bg:rgba(244,248,253,.66);
  --nav-strong:rgba(246,249,253,.96);
  --shadow-1:0 1px 2px rgba(13,20,34,.04),0 22px 44px -30px rgba(13,20,34,.38);
  --shadow-2:0 2px 4px rgba(13,20,34,.05),0 40px 80px -40px rgba(13,20,34,.42);

  /* 课程六色（浅） */
  --c-amber:#f7dea3;   --ci-amber:#6b4a08;
  --c-azure:#cfe4f7;   --ci-azure:#1f537f;
  --c-sage:#cfe8c9;    --ci-sage:#2f6134;
  --c-lilac:#dad7f3;   --ci-lilac:#453e82;
  --c-rose:#f6cdcd;    --ci-rose:#7d3038;
  --c-sand:#ece0cd;    --ci-sand:#6b5a3f;

  --r-sm:12px;
  --r:20px;
  --r-lg:28px;
  --pad:28px;
  --nav-h:64px;
}

[data-theme="dark"]{
  color-scheme:dark;
  --bg:#070c15;
  --bg-2:#0a1120;
  --ink:#e9eef8;
  --ink-2:#a4b1c6;
  --ink-3:#71809a;

  --accent:#f0a077;
  --accent-deep:#ffc4a3;
  --accent-soft:rgba(240,160,119,.10);
  --accent-line:rgba(240,160,119,.3);
  --btn-bg:#f0a077;
  --btn-ink:#1a1108;

  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.085);
  --glass-3:rgba(255,255,255,.12);
  --stroke:rgba(255,255,255,.09);
  --stroke-strong:rgba(255,255,255,.17);
  --edge:inset 0 1px 0 rgba(255,255,255,.07);
  --glow:0 0 0 1px rgba(240,160,119,.26),0 10px 26px -12px rgba(240,160,119,.28);
  --ring:rgba(255,255,255,.05);
  --hairline:rgba(255,255,255,.09);
  --grid-line:rgba(255,255,255,.045);
  --nav-bg:rgba(10,17,32,.62);
  --nav-strong:rgba(11,18,33,.95);
  --shadow-1:0 1px 2px rgba(0,0,0,.3),0 22px 44px -26px rgba(0,0,0,.7);
  --shadow-2:0 2px 4px rgba(0,0,0,.35),0 40px 80px -36px rgba(0,0,0,.8);

  --c-amber:#5c4517;   --ci-amber:#ffe4a8;
  --c-azure:#16395a;   --ci-azure:#cfe6ff;
  --c-sage:#17452a;    --ci-sage:#c9eec1;
  --c-lilac:#332b64;   --ci-lilac:#ded8ff;
  --c-rose:#5b2730;    --ci-rose:#ffd5d9;
  --c-sand:#463a28;    --ci-sand:#efe1c9;
}

/* ==================== 基础 ==================== */
html{scroll-behavior:smooth;scroll-padding-top:104px;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.72;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  transition:background-color .6s ease,color .6s ease;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
::selection{background:var(--accent);color:var(--btn-ink)}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 var(--pad)}
main{position:relative;z-index:1}

.skip{
  position:fixed;top:-100px;left:16px;z-index:3000;
  padding:10px 18px;border-radius:999px;background:var(--ink);color:var(--bg);
  font-size:13px;text-decoration:none;transition:top .2s ease;
}
.skip:focus{top:16px}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px}

/* ==================== 背景：色场 + 网格 + 颗粒 ==================== */
.bg{position:fixed;inset:0;z-index:-3;pointer-events:none;overflow:hidden}
.bg-field{
  position:absolute;inset:-32%;
  background:
    radial-gradient(38% 40% at 78% 8%,rgba(255,170,104,.34),transparent 68%),
    radial-gradient(42% 44% at 12% 58%,rgba(104,152,255,.28),transparent 70%),
    radial-gradient(34% 36% at 92% 86%,rgba(176,140,255,.20),transparent 72%),
    radial-gradient(50% 50% at 40% 106%,rgba(120,200,230,.18),transparent 70%);
  filter:blur(72px) saturate(1.15);
  animation:fieldDrift 34s ease-in-out infinite alternate;
  will-change:transform;
}
[data-theme="dark"] .bg-field{
  background:
    radial-gradient(38% 40% at 78% 8%,rgba(255,128,58,.20),transparent 68%),
    radial-gradient(42% 44% at 10% 56%,rgba(52,108,226,.30),transparent 70%),
    radial-gradient(34% 36% at 94% 88%,rgba(126,84,220,.22),transparent 72%),
    radial-gradient(46% 46% at 44% 104%,rgba(20,80,110,.35),transparent 70%);
}
@keyframes fieldDrift{
  0%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-2%,2%,0) scale(1.06)}
  100%{transform:translate3d(2%,-1%,0) scale(1.02)}
}

.bg-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:88px 88px;
  -webkit-mask-image:radial-gradient(130% 100% at 50% 0%,#000 10%,rgba(0,0,0,.55) 52%,transparent 88%);
  mask-image:radial-gradient(130% 100% at 50% 0%,#000 10%,rgba(0,0,0,.55) 52%,transparent 88%);
}

.bg-cursor{
  position:absolute;top:0;left:0;width:640px;height:640px;margin:-320px 0 0 -320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,226,196,.30),rgba(255,226,196,0) 62%);
  transform:translate3d(var(--mx,50vw),var(--my,50vh),0);
  transition:opacity .6s ease;
  will-change:transform;
}
[data-theme="dark"] .bg-cursor{background:radial-gradient(circle,rgba(255,150,90,.16),rgba(255,150,90,0) 62%)}

body::after{
  content:"";position:fixed;inset:0;z-index:2100;pointer-events:none;opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
[data-theme="dark"] body::after{opacity:.02}

/* ==================== 玻璃 ==================== */
.glass{
  position:relative;
  background:var(--glass);
  border:1px solid var(--stroke);
  border-radius:var(--r);
  box-shadow:var(--edge),var(--shadow-1);
  backdrop-filter:blur(24px) saturate(1.5);
  -webkit-backdrop-filter:blur(24px) saturate(1.5);
}
.glass::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(152deg,rgba(255,255,255,.32),rgba(255,255,255,0) 44%);
  opacity:.9;
}
[data-theme="dark"] .glass::after{background:linear-gradient(152deg,rgba(255,255,255,.09),rgba(255,255,255,0) 46%)}

/* 指针聚光（desktop） */
[data-spot]::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:0;
  background:radial-gradient(220px 220px at var(--sx,50%) var(--sy,0%),rgba(255,255,255,.55),transparent 70%);
  opacity:0;transition:opacity .4s ease;
}
[data-theme="dark"] [data-spot]::before{background:radial-gradient(220px 220px at var(--sx,50%) var(--sy,0%),rgba(255,255,255,.10),transparent 70%)}
[data-spot]:hover::before{opacity:1}
[data-spot]>*{position:relative;z-index:1}

/* ==================== 按钮 ==================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 24px;border-radius:999px;border:1px solid transparent;
  font-family:var(--sans);font-size:14.5px;font-weight:600;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:transform .35s cubic-bezier(.16,1,.3,1),background-color .28s ease,border-color .28s ease,box-shadow .35s ease,color .28s ease;
}
.btn svg{width:16px;height:16px;flex:0 0 auto;transition:transform .35s cubic-bezier(.16,1,.3,1)}
.btn-primary{background:var(--btn-bg);color:var(--btn-ink);box-shadow:0 10px 24px -14px rgba(178,67,26,.9)}
.btn-primary:hover{box-shadow:0 16px 30px -14px rgba(178,67,26,.8);transform:translateY(-2px)}
.btn-primary:hover svg{transform:translateX(3px)}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-ghost{background:var(--glass-2);color:var(--ink);border-color:var(--stroke-strong);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent)}
.btn-sm{height:38px;padding:0 16px;font-size:13px}

/* ==================== 导航 ==================== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;padding:12px var(--pad)}
.nav-content{
  max-width:1180px;margin:0 auto;height:var(--nav-h);
  display:flex;align-items:center;gap:14px;
  padding:0 16px 0 22px;border-radius:999px;
  border:1px solid transparent;background:transparent;
  transition:background-color .45s ease,border-color .45s ease,box-shadow .45s ease,backdrop-filter .45s ease;
}
.navbar.scrolled .nav-content{
  background:var(--nav-bg);
  border-color:var(--stroke);
  backdrop-filter:blur(22px) saturate(1.6);
  -webkit-backdrop-filter:blur(22px) saturate(1.6);
  box-shadow:var(--edge),0 18px 40px -30px rgba(13,20,34,.5);
}
.logo{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:650;letter-spacing:-.01em;text-decoration:none;color:var(--ink);flex:0 0 auto}
.logo-icon{width:30px;height:30px;border-radius:9px;object-fit:cover;box-shadow:0 4px 12px -4px rgba(236,72,153,.5)}
.logo em{font-style:normal;color:var(--ink-2);font-weight:500;font-size:12.5px;letter-spacing:.02em;margin-left:-3px}
.nav-links{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-right{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-right .nav-links{margin:0}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:999px;text-decoration:none;
  color:var(--ink-2);font-size:13.5px;font-weight:520;letter-spacing:.01em;
  transition:color .22s ease,background-color .22s ease;
}
.nav-links a:hover{color:var(--ink);background:var(--glass)}
.nav-links a.on{color:var(--ink)}
.nav-links a.on::after{
  content:"";position:absolute;left:50%;bottom:1px;width:4px;height:4px;border-radius:50%;
  background:var(--accent);transform:translateX(-50%);
}
.nav-cta{
  display:inline-flex;align-items:center;padding:8px 14px;border-radius:999px;
  border:1px solid var(--stroke-strong);text-decoration:none;
  font-size:13px;font-weight:550;color:var(--ink);white-space:nowrap;
  transition:border-color .22s ease,color .22s ease,background-color .22s ease,box-shadow .25s ease;
}
.nav-cta:hover{border-color:var(--accent);color:var(--accent)!important;background:var(--accent-soft)!important;box-shadow:var(--glow)}

.theme-toggle{
  width:38px;height:38px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--stroke-strong);border-radius:50%;
  background:var(--glass-2);color:var(--ink);cursor:pointer;
  backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  transition:color .22s ease,border-color .22s ease,box-shadow .28s ease,transform .2s ease;
}
.theme-toggle:hover{color:var(--accent);border-color:var(--accent);box-shadow:var(--glow)}
.theme-toggle:active{transform:scale(.92)}
.theme-toggle svg{width:16px;height:16px}
.theme-toggle .icon-dark{display:none}
.theme-toggle .icon-light{display:block}
[data-theme="dark"] .theme-toggle .icon-dark{display:block}
[data-theme="dark"] .theme-toggle .icon-light{display:none}

.hamburger{display:none;width:38px;height:38px;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:1px solid var(--stroke-strong);border-radius:50%;background:var(--glass-2);cursor:pointer}
.hamburger span{width:15px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .3s ease}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* 法务页的抽屉 */
.mobile-menu{
  position:fixed;top:86px;right:var(--pad);z-index:1000;min-width:196px;padding:10px;
  background:var(--glass-3);border:1px solid var(--stroke);border-radius:18px;
  box-shadow:var(--edge),var(--shadow-2);
  backdrop-filter:blur(26px) saturate(1.6);-webkit-backdrop-filter:blur(26px) saturate(1.6);
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px) scale(.98);transform-origin:top right;
  pointer-events:none;transition:opacity .2s ease,transform .2s ease,visibility 0s .2s;
}
.mobile-menu.open{opacity:1;visibility:visible;transform:none;pointer-events:auto;transition:opacity .2s ease,transform .2s ease,visibility 0s}
.mobile-menu a{color:var(--ink);text-decoration:none;font-size:14.5px;font-weight:520;padding:11px 14px;border-radius:12px}
.mobile-menu a:hover{background:var(--accent-soft);color:var(--accent)}

/* ==================== 底部 Dock（仅首页移动端） ==================== */
.dock{display:none}

/* ==================== 版块标题 ==================== */
.sec{padding:100px 0;position:relative}
.sec-head{
  display:grid;grid-template-columns:104px minmax(0,1fr) minmax(0,.72fr);
  gap:18px 36px;align-items:end;margin-bottom:54px;
}
.sec-tag{
  display:flex;align-items:center;gap:9px;
  font-family:var(--latin);font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);white-space:nowrap;
}
.sec-tag i{font-style:normal;color:var(--ink-3);letter-spacing:.04em}
.sec-tag::before{content:"";width:18px;height:1px;background:var(--accent-line)}
.sec-head h2{
  font-size:clamp(27px,3.3vw,44px);
  font-weight:600;line-height:1.12;letter-spacing:-.028em;text-wrap:balance;
}
.sec-head .sub{
  font-size:14px;color:var(--ink-2);line-height:1.8;max-width:32em;
  padding-bottom:6px;
}
.sec-head .sub b{color:var(--ink);font-weight:600}

/* ==================== 首屏 ==================== */
.hero{position:relative;padding:132px 0 72px}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,.94fr) minmax(0,1.06fr);
  gap:32px;align-items:center;
}
.hero-copy{position:relative;z-index:2;max-width:580px}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 14px 7px 11px;border-radius:999px;
  border:1px solid var(--stroke);background:var(--glass-2);
  backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  font-size:12px;font-weight:520;color:var(--ink-2);letter-spacing:.01em;
  margin-bottom:30px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);animation:blip 2.6s ease-in-out infinite}
.eyebrow b{font-family:var(--latin);font-weight:600;color:var(--ink);letter-spacing:.01em}
.eyebrow .sep{width:1px;height:11px;background:var(--hairline)}
@keyframes blip{0%,100%{opacity:1}50%{opacity:.45}}

.hero-title{
  font-size:clamp(40px,5.5vw,80px);
  font-weight:600;line-height:1.02;letter-spacing:-.032em;
  margin-bottom:24px;
}
.hero-title .ln{display:block;overflow:hidden;padding-bottom:.24em;margin-bottom:-.2em}
.hero-title .ln>span{display:inline-block;transform:translateY(108%);animation:lineUp .95s cubic-bezier(.16,1,.3,1) forwards}
.hero-title .ln:nth-child(1)>span{animation-delay:.05s}
.hero-title .ln:nth-child(2)>span{animation-delay:.16s}
@keyframes lineUp{to{transform:translateY(0)}}

.swash{position:relative;font-style:normal;display:inline-block}
.swash svg{
  position:absolute;left:-3%;bottom:.02em;width:106%;height:.14em;overflow:visible;
  stroke:var(--accent);stroke-width:2.6;fill:none;stroke-linecap:round;
  stroke-dasharray:240;stroke-dashoffset:240;
  animation:draw 1.1s cubic-bezier(.16,1,.3,1) .85s forwards;
  opacity:.85;
}
@keyframes draw{to{stroke-dashoffset:0}}

.hero-sub{
  font-size:15.5px;line-height:1.85;color:var(--ink-2);
  max-width:30em;margin-bottom:34px;
  opacity:0;animation:fadeUp .8s cubic-bezier(.16,1,.3,1) .34s forwards;
}
.hero-sub b{color:var(--ink);font-weight:600}
.hero-cta{display:flex;align-items:center;gap:10px;margin-bottom:44px;opacity:0;animation:fadeUp .8s cubic-bezier(.16,1,.3,1) .42s forwards}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.stats{
  display:flex;gap:0;
  visibility:hidden;opacity:0;transform:translateY(10px);
  transition:opacity .55s ease .06s,transform .55s cubic-bezier(.16,1,.3,1) .06s;
}
.stats.show{visibility:visible;opacity:1;transform:none}
.stats>div{position:relative;padding:0 22px}
.stats>div:first-child{padding-left:0}
.stats>div+div::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:var(--hairline)}
.stats dd{
  font-family:var(--latin);font-size:26px;font-weight:600;line-height:1.1;
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--ink);
}
.stats dt{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:5px;font-weight:520}
.stats dd em{font-style:normal;font-size:13px;color:var(--ink-3);font-weight:500}

/* ---- 首屏右侧：课表舞台 ---- */
.stage{
  position:relative;width:100%;max-width:600px;margin-left:auto;
  aspect-ratio:1.08/1;perspective:1400px;
}
.stage-inner{
  position:absolute;inset:0;transform-style:preserve-3d;
  transform:rotateX(0deg) rotateY(0deg);
  will-change:transform;
}
.stage-num{
  position:absolute;top:-6%;right:-2%;z-index:0;
  font-family:var(--latin);font-size:clamp(120px,15vw,208px);font-weight:700;line-height:.8;
  letter-spacing:-.05em;color:transparent;
  -webkit-text-stroke:1px var(--stroke-strong);
  opacity:.55;user-select:none;
}
.stage-board{
  position:absolute;left:-3%;top:17%;width:74%;
  transform:rotateY(-9deg) rotateX(5deg) rotateZ(-1.2deg);
  z-index:1;
}
.stage-phone{
  position:absolute;right:-1%;bottom:2%;width:30%;z-index:4;
  transform:rotate(2.2deg);
  will-change:transform;
}
.stage-phone img{width:100%;border-radius:7.5%;animation:phoneFloat 9s ease-in-out infinite}
@keyframes phoneFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}
.stage-float{
  position:absolute;z-index:5;
  display:flex;align-items:center;gap:8px;
  padding:9px 14px 9px 11px;border-radius:14px;
  background:var(--glass-3);border:1px solid var(--stroke);
  box-shadow:var(--edge),0 14px 30px -18px rgba(13,20,34,.55);
  backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5);
  font-size:11.5px;font-weight:600;letter-spacing:.01em;color:var(--ink);
  white-space:nowrap;
}
.stage-float i{width:8px;height:8px;border-radius:3px;flex:0 0 auto;background:var(--c,var(--accent))}
.stage-float small{display:block;font-size:9.5px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.stage-float.f1{top:-4%;left:6%;animation:floaty 7s ease-in-out infinite}
.stage-float.f2{bottom:-1%;left:2%;animation:floaty 8.5s ease-in-out infinite reverse}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* ---- 课表盘 ---- */
.board{
  border-radius:18px;padding:11px 11px 9px;
  background:rgba(255,255,255,.76);
  border:1px solid rgba(255,255,255,.75);
  box-shadow:0 1px 2px rgba(13,20,34,.05),0 34px 60px -30px rgba(13,20,34,.4),inset 0 1px 0 rgba(255,255,255,.9);
}
[data-theme="dark"] .board{background:rgba(15,23,39,.82);border-color:rgba(255,255,255,.08);box-shadow:0 34px 70px -30px rgba(0,0,0,.85),inset 0 1px 0 rgba(255,255,255,.06)}
.board-head{display:flex;align-items:center;justify-content:space-between;padding:0 3px 9px}
.board-title{font-size:11px;font-weight:650;color:var(--ink);letter-spacing:.02em}
.board-title span{font-family:var(--latin);font-weight:500;color:var(--ink-3);margin-left:6px;font-size:10.5px;letter-spacing:.02em}
.board-now{
  display:flex;align-items:center;gap:5px;font-size:10px;font-weight:600;color:var(--accent);
}
.board-now::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);animation:blip 2s ease-in-out infinite}
.board-grid{
  position:relative;display:grid;
  grid-template-columns:26px repeat(5,minmax(0,1fr));
  grid-template-rows:26px repeat(6,minmax(0,1fr));
  gap:3px;height:290px;
}
.bh{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;font-size:9.5px;font-weight:650;color:var(--ink-2);letter-spacing:.04em}
.bh span{font-family:var(--latin);font-size:8.5px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.bh.today{color:var(--accent)}
.bh.today span{color:var(--accent);opacity:.75}
.bp{display:flex;align-items:flex-start;justify-content:center;padding-top:4px;font-family:var(--latin);font-size:9px;font-weight:600;color:var(--ink-3)}
.chip{
  grid-column:var(--col);grid-row:var(--row);
  display:flex;flex-direction:column;justify-content:center;gap:1px;
  padding:5px 6px;border-radius:7px;overflow:hidden;
  background:var(--c);color:var(--ci);
  font-size:10px;font-weight:650;line-height:1.22;letter-spacing:-.01em;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.35);
  transition:transform .3s cubic-bezier(.16,1,.3,1),box-shadow .3s ease;
}
.chip small{font-size:8.5px;font-weight:500;opacity:.8;letter-spacing:0}
.chip.dim{opacity:.45}
.chip.is-now{box-shadow:inset 0 0 0 1.5px var(--accent),0 4px 12px -6px rgba(178,67,26,.6)}
.c-amber{--c:var(--c-amber);--ci:var(--ci-amber)}
.c-azure{--c:var(--c-azure);--ci:var(--ci-azure)}
.c-sage{--c:var(--c-sage);--ci:var(--ci-sage)}
.c-lilac{--c:var(--c-lilac);--ci:var(--ci-lilac)}
.c-rose{--c:var(--c-rose);--ci:var(--ci-rose)}
.c-sand{--c:var(--c-sand);--ci:var(--ci-sand)}
.nowline{
  position:absolute;left:0;right:0;height:0;z-index:6;
  border-top:1.5px solid var(--accent);
  opacity:0;transition:opacity .5s ease,top .8s cubic-bezier(.16,1,.3,1);
  pointer-events:none;
}
.nowline::before{content:"";position:absolute;left:-3px;top:-4px;width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.nowline.on{opacity:1}

/* ---- 移动端首屏 ---- */
.hero-mobile{display:none}
.hero-shot-m{position:relative;width:48%;max-width:206px;margin:0 auto}
.hero-shot-m::before{
  content:"";position:absolute;inset:-14% -22%;z-index:-1;border-radius:50%;
  background:radial-gradient(circle at 50% 45%,var(--accent-soft),rgba(255,168,96,.22) 45%,transparent 70%);
  filter:blur(26px);
}
.hero-shot-m img{
  width:100%;border-radius:7.5%;
  animation:phoneFloat 9s ease-in-out infinite;
}
.today{margin-top:22px}
.today-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:9px}
.today-head b{font-size:12.5px;font-weight:650;letter-spacing:.01em}
.today-head span{font-size:11px;color:var(--ink-3);font-family:var(--latin);letter-spacing:.04em}
.today-rail{
  display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x mandatory;
  margin:0 calc(var(--pad) * -1);padding:2px var(--pad) 4px;
  scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch;
}
.today-rail::-webkit-scrollbar{display:none}
.tcard{
  position:relative;flex:0 0 auto;scroll-snap-align:start;
  min-width:148px;padding:10px 12px 11px 14px;border-radius:14px;
  background:var(--glass-2);border:1px solid var(--stroke);box-shadow:var(--edge);
  overflow:hidden;
}
.tcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c,var(--hairline))}
.tcard .t-time{font-family:var(--latin);font-size:10.5px;font-weight:600;color:var(--ink-3);letter-spacing:.05em;font-variant-numeric:tabular-nums}
.tcard .t-name{font-size:13px;font-weight:650;margin-top:2px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tcard .t-room{font-size:10.5px;color:var(--ink-3);margin-top:1px}
.tcard.now{border-color:var(--accent-line);box-shadow:var(--edge),0 8px 20px -14px rgba(178,67,26,.9)}
.tcard.now .t-time{color:var(--accent)}
.tcard.rest{min-width:210px;display:flex;flex-direction:column;justify-content:center}
.tcard.rest .t-name{font-size:13.5px;white-space:normal}
.tcard.rest .t-room{margin-top:3px}

/* ==================== 功能 ==================== */
.features-grid{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:14px;
}
.fcard{
  position:relative;overflow:hidden;
  padding:24px 24px 22px;
  display:flex;flex-direction:column;
  transition:transform .45s cubic-bezier(.16,1,.3,1),border-color .3s ease,box-shadow .4s ease;
}
.fcard:hover{transform:translateY(-4px);border-color:var(--stroke-strong);box-shadow:var(--edge),var(--shadow-2)}
.fcard-lg{grid-column:span 5}
.fcard-wide{grid-column:span 7}
.fcard-mid{grid-column:span 4}
.fcard-sm{grid-column:span 3}
.fcard-quarter{grid-column:span 4}
.fcard-5{grid-column:span 5}
.fcard-6{grid-column:span 6}
.fc-head{display:grid;grid-template-columns:1fr auto;align-items:center;column-gap:8px;row-gap:11px;margin-bottom:12px}
.fc-num{font-family:var(--latin);font-size:11px;font-weight:600;color:var(--ink-3);letter-spacing:.14em}
.fc-kicker{font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);opacity:.9;text-align:right}
.fc-title{grid-column:1/-1;font-size:17px;font-weight:650;letter-spacing:-.012em;line-height:1.3}
.fcard p{font-size:13px;line-height:1.72;color:var(--ink-2);max-width:30em}
.fcard-lg .fc-title{font-size:21px;letter-spacing:-.018em}
.fcard-lg p{font-size:13.5px}
.fc-toggle{display:none}
.fc-body{display:grid;grid-template-rows:1fr;flex:1 1 auto;min-height:0}
.fc-body>div{overflow:hidden;display:flex;flex-direction:column}
.fc-inner{display:flex;flex-direction:column;flex:1 1 auto}
.fc-vis{margin-top:18px;flex:1 1 auto;min-height:76px;position:relative;display:flex;align-items:center}
.fcard-lg .vi-win{padding:11px 12px;gap:6px}
.fcard-lg .vi-bar{height:5px}
.fcard-lg .vi-btn{height:13px;width:42%}
.fcard-lg .vi-grid span{height:28px}
.fcard-lg .vi-arrow{height:22px}

/* 视觉 1：导入流水线（表单 → 同步 → 课表） */
.vis-import{display:flex;flex-direction:column;justify-content:center;align-items:stretch;width:100%}
.vi-win{
  width:100%;border-radius:9px;padding:9px 11px;background:var(--glass-3);
  border:1px solid var(--stroke);box-shadow:var(--edge);display:flex;flex-direction:column;gap:5px;
}
.vi-dots{display:flex;gap:3px;margin-bottom:2px}
.vi-dots i{width:4px;height:4px;border-radius:50%;background:var(--ink-3);opacity:.4}
.vi-bar{height:4px;border-radius:2px;background:var(--hairline)}
.vi-bar.w70{width:70%}
.vi-bar.w45{width:45%}
.vi-btn{margin-top:3px;width:38%;height:10px;border-radius:4px;background:var(--accent);opacity:.8}
.vi-arrow{
  position:relative;width:1px;height:18px;margin:0 auto;flex:0 0 auto;opacity:.5;
  background:repeating-linear-gradient(180deg,var(--ink-3) 0 3px,transparent 3px 6px);
}
.vi-arrow::after{
  content:"";position:absolute;left:-2.5px;top:0;width:6px;height:6px;border-radius:50%;background:var(--accent);
  animation:viTravel 2.6s cubic-bezier(.5,0,.5,1) infinite;
}
@keyframes viTravel{0%{top:0;opacity:0}18%{opacity:1}82%{opacity:1}100%{top:100%;opacity:0}}
.vi-grid{width:100%;display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.vi-grid span{height:26px;border-radius:3px;background:var(--c);animation:viPop 4s ease-in-out infinite}
.vi-grid span:nth-child(5n+1){--c:var(--c-amber);animation-delay:.1s}
.vi-grid span:nth-child(5n+2){--c:var(--c-azure);animation-delay:.24s}
.vi-grid span:nth-child(5n+3){--c:var(--c-sage);animation-delay:.38s}
.vi-grid span:nth-child(5n+4){--c:var(--c-lilac);animation-delay:.52s}
.vi-grid span:nth-child(5n+5){--c:var(--c-rose);animation-delay:.66s}
@keyframes viPop{0%,55%,100%{opacity:.55;transform:scale(.96)}70%{opacity:1;transform:scale(1)}}

/* 视觉 2：迷你周课表 */
.vi-week{
  width:100%;display:flex;flex-direction:column;justify-content:center;align-items:stretch;gap:6px;
  padding:9px 10px 10px;border-radius:9px;
  background:var(--glass-3);border:1px solid var(--stroke);box-shadow:var(--edge);
}
.vi-week-bar{display:flex;align-items:center;justify-content:space-between;font-size:8.5px;letter-spacing:.02em;color:var(--ink-3)}
.vi-week-bar em{font-style:normal;color:var(--accent);font-weight:600}
.vi-week-days{display:grid;grid-template-columns:15px repeat(5,1fr);gap:3px;text-align:center;font-size:8px;color:var(--ink-3);line-height:1}
.vi-week-grid{
  position:relative;display:grid;grid-template-columns:15px repeat(5,1fr);
  grid-template-rows:repeat(4,15px);gap:3px;
}
.vi-week-grid b{border-radius:3px;background:var(--c);box-shadow:inset 0 0 0 1px rgba(255,255,255,.3)}
.vi-week-grid .vi-p{font-style:normal;font-size:7px;line-height:1;color:var(--ink-3);display:flex;align-items:center;justify-content:center}
.vi-week-now{
  position:absolute;left:15px;right:-2px;top:54%;height:0;
  border-top:1px solid var(--accent);opacity:.85;pointer-events:none;
}
.vi-week-now::before{content:"";position:absolute;left:-3px;top:-2.5px;width:4px;height:4px;border-radius:50%;background:var(--accent)}

/* 视觉 3：提醒 / 超级岛 */
.vi-remind{display:flex;flex-direction:column;gap:8px;align-items:flex-start;width:100%}
.vi-island{
  display:flex;align-items:center;gap:6px;height:22px;padding:0 11px;border-radius:999px;
  background:var(--ink);color:var(--bg);font-size:9.5px;font-weight:600;
  animation:viIsland 5s ease-in-out infinite;overflow:hidden;white-space:nowrap;
}
.vi-island i{width:5px;height:5px;border-radius:50%;background:var(--accent);flex:0 0 auto}
@keyframes viIsland{0%,18%{max-width:26px;padding-left:10px;padding-right:8px}36%,76%{max-width:190px;padding-left:11px;padding-right:16px}94%,100%{max-width:26px}}
.vi-notif{
  display:flex;flex-direction:column;gap:1px;padding:7px 11px;border-radius:9px;
  background:var(--glass-3);border:1px solid var(--stroke);box-shadow:var(--edge);
  font-size:9.5px;line-height:1.35;animation:viNotif 5s ease-in-out infinite;
}
.vi-notif b{font-size:10px;font-weight:650}
.vi-notif span{color:var(--ink-3);font-size:9px}
@keyframes viNotif{0%,20%{opacity:0;transform:translateY(6px)}40%,80%{opacity:1;transform:none}100%{opacity:.6;transform:none}}

/* 视觉 4：小组件 */
.vi-widget{
  width:74px;padding:9px 10px;border-radius:12px;background:var(--glass-3);
  border:1px solid var(--stroke);box-shadow:var(--edge);
  display:flex;flex-direction:column;gap:2px;
  transition:transform .5s cubic-bezier(.16,1,.3,1);
}
.fcard:hover .vi-widget{transform:rotate(-4deg) translateY(-2px)}
.vi-widget small{font-size:8px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-weight:600}
.vi-widget b{font-family:var(--latin);font-size:22px;line-height:1;font-weight:600;letter-spacing:-.03em}
.vi-widget b em{font-style:normal;font-size:9px;color:var(--ink-3);margin-left:2px}
.vi-widget u{display:block;height:3px;border-radius:2px;background:var(--hairline);text-decoration:none}
.vi-widget u:last-child{width:62%;background:var(--c-sage)}

/* 视觉 5：同步 */
.vi-sync{position:relative;width:100%;min-height:64px}
.vi-sync svg{width:100%;height:64px;overflow:visible}
.vi-sync .node{fill:var(--glass-3);stroke:var(--stroke-strong)}
.vi-sync .arc{fill:none;stroke:var(--ink-3);stroke-width:1;stroke-dasharray:3 4;opacity:.6}

/* 视觉 6：勿扰 */
.vi-dnd{display:flex;align-items:center;gap:9px}
.vi-switch{
  position:relative;width:38px;height:22px;border-radius:999px;
  background:var(--hairline);animation:viSwitch 5s ease-in-out infinite;
}
.vi-switch::after{
  content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;
  background:#fff;box-shadow:0 1px 3px rgba(13,20,34,.3);
  animation:viKnob 5s ease-in-out infinite;
}
@keyframes viSwitch{0%,18%{background:var(--hairline)}32%,100%{background:var(--accent)}}
@keyframes viKnob{0%,18%{transform:translateX(0)}32%,100%{transform:translateX(16px)}}
.vi-dnd span{font-size:10px;font-weight:600;color:var(--ink-2)}
.vi-dnd span b{color:var(--accent);font-weight:650}

/* 视觉 7：格式 */
.vi-format{display:flex;flex-wrap:wrap;gap:5px;width:100%}
.vi-format i{
  font-style:normal;font-size:9px;font-weight:650;letter-spacing:.02em;
  padding:4px 8px;border-radius:6px;background:var(--c);color:var(--ci);
  animation:viChip 5s ease-in-out infinite;
}
.vi-format i:nth-child(1){--c:var(--c-azure);--ci:var(--ci-azure)}
.vi-format i:nth-child(2){--c:var(--c-amber);--ci:var(--ci-amber);animation-delay:.3s}
.vi-format i:nth-child(3){--c:var(--c-lilac);--ci:var(--ci-lilac);animation-delay:.6s}
.vi-format i:nth-child(4){--c:var(--c-sage);--ci:var(--ci-sage);animation-delay:.9s}
@keyframes viChip{0%,100%{transform:translateY(0)}45%{transform:translateY(-3px)}}

/* 移动端手风琴 */
.fc-toggle{display:none}

.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;
}
[hidden]{display:none!important}
/* 主题切换期间关掉元素过渡，避免与新快照叠加 */
html.vt,html.vt *{transition:none!important;animation-duration:.001ms!important}

/* ==================== 预览 ==================== */
.preview{overflow:hidden}
.reel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.reel-cap{min-width:0}
.reel-cap h3{font-size:clamp(20px,2.2vw,26px);font-weight:600;letter-spacing:-.022em;transition:opacity .3s ease,transform .3s ease}
.reel-cap p{font-size:13px;color:var(--ink-2);margin-top:3px;transition:opacity .3s ease,transform .3s ease}
.reel-cap.swap h3,.reel-cap.swap p{opacity:0;transform:translateY(6px)}
.reel-ctrl{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.reel-count{font-family:var(--latin);font-size:12px;font-weight:600;color:var(--ink-3);letter-spacing:.06em;margin-right:4px}
.reel-count b{color:var(--ink);font-weight:600;font-size:15px}
.rbtn{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid var(--stroke-strong);background:var(--glass-2);
  color:var(--ink);cursor:pointer;transition:border-color .2s,color .2s,transform .2s;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.rbtn:hover{border-color:var(--accent);color:var(--accent)}
.rbtn:active{transform:scale(.93)}
.rbtn svg{width:15px;height:15px}

.reel{
  display:flex;gap:26px;
  overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;-ms-overflow-style:none;
  padding:14px calc(50% - clamp(110px,14vw,142px)) 28px;
  -webkit-overflow-scrolling:touch;
  cursor:grab;
}
.reel::-webkit-scrollbar{display:none}
.reel.dragging{cursor:grabbing;scroll-snap-type:none}
.shot{
  position:relative;flex:0 0 auto;width:clamp(220px,28vw,284px);
  scroll-snap-align:center;
  transition:transform .55s cubic-bezier(.16,1,.3,1),opacity .5s ease,filter .5s ease;
  opacity:.5;transform:scale(.9);
}
.shot img{
  width:100%;border-radius:7.5%;
  -webkit-user-drag:none;user-select:none;
}
.shot.on{opacity:1;transform:scale(1)}
.shot figcaption{
  position:absolute;left:50%;bottom:-4px;transform:translate(-50%,8px);
  font-family:var(--latin);font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-3);opacity:0;transition:opacity .35s ease,transform .35s ease;white-space:nowrap;
}
.shot.on figcaption{opacity:1;transform:translate(-50%,14px)}
.reel-dots{display:flex;justify-content:center;gap:6px;margin-top:14px}
.reel-dots button{
  width:6px;height:6px;border-radius:50%;border:none;padding:0;cursor:pointer;
  background:var(--stroke-strong);transition:width .35s cubic-bezier(.16,1,.3,1),background-color .3s;
}
.reel-dots button.on{width:22px;border-radius:4px;background:var(--accent)}
.reel-hint{text-align:center;font-size:11.5px;color:var(--ink-3);margin-top:12px;letter-spacing:.02em}

/* ==================== 下载 ==================== */
.dl{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:0;border-radius:var(--r-lg);
}
.dl-left{padding:38px 36px;border-right:1px solid var(--hairline);position:relative;z-index:1}
.dl-app{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.dl-app img{width:52px;height:52px;border-radius:15px;box-shadow:0 10px 24px -10px rgba(236,72,153,.6)}
.dl-app b{display:block;font-size:16px;font-weight:650;letter-spacing:-.01em}
.dl-app>div>span{display:block;font-size:11.5px;color:var(--ink-3);font-family:var(--latin);letter-spacing:.04em}
.dl-app>div>span span{display:inline}
.dl-left h3{font-size:clamp(22px,2.4vw,30px);font-weight:600;letter-spacing:-.026em;line-height:1.2;margin-bottom:10px}
.dl-left p{font-size:13px;color:var(--ink-2);line-height:1.75;margin-bottom:22px;max-width:24em}
.dl-actions{display:flex;flex-wrap:wrap;gap:9px}
.dl-note{display:flex;align-items:center;gap:6px;margin-top:18px;font-size:11.5px;color:var(--ink-3)}
.dl-note svg{width:13px;height:13px;flex:0 0 auto}

.dl-right{padding:22px;display:flex;flex-direction:column;justify-content:center;gap:10px;position:relative;z-index:1}
.dl-item{
  display:flex;align-items:center;gap:14px;
  padding:16px 18px;border-radius:16px;text-decoration:none;color:var(--ink);
  background:var(--glass-2);border:1px solid var(--stroke);
  transition:transform .4s cubic-bezier(.16,1,.3,1),border-color .28s ease,box-shadow .35s ease,background-color .28s ease;
  position:relative;overflow:hidden;
}
.dl-item:hover{transform:translateX(3px);border-color:var(--accent);box-shadow:var(--glow);background:var(--glass-3)}
.dl-item .ico{width:40px;height:40px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--stroke)}
.dl-item .ico svg{width:20px;height:20px}
.dl-item b{display:block;font-size:14px;font-weight:650}
.dl-item small{display:block;font-size:11.5px;color:var(--ink-3);margin-top:1px}
.dl-item .arrow{margin-left:auto;color:var(--ink-3);transition:transform .4s cubic-bezier(.16,1,.3,1),color .25s}
.dl-item:hover .arrow{transform:translateX(4px);color:var(--accent)}
.dl-item .arrow svg{width:16px;height:16px}
.dl-tip{
  margin-top:6px;padding:14px 16px;border-radius:14px;
  border:1px dashed var(--hairline);font-size:11.5px;line-height:1.7;color:var(--ink-3);
}
.dl-tip b{color:var(--ink-2);font-weight:600}

/* ==================== 社区 + 页脚 ==================== */
.community{padding-top:0;padding-bottom:40px}
.community-inner{
  display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px;
  padding:30px 34px;border-radius:var(--r-lg);
}
.community-inner h2{font-size:clamp(20px,2.2vw,26px);font-weight:600;letter-spacing:-.024em}
.community-inner p{font-size:13px;color:var(--ink-2);margin-top:2px}
.community-links{display:flex;flex-wrap:wrap;gap:8px}

footer{position:relative;padding:54px 0 34px;margin-top:36px;border-top:1px solid var(--hairline);overflow:hidden}
.foot-grid{display:flex;justify-content:space-between;align-items:flex-start;gap:28px;flex-wrap:wrap;position:relative;z-index:1}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:650;letter-spacing:-.01em}
.foot-brand img{width:26px;height:26px;border-radius:8px}
.foot-links{display:flex;gap:18px;font-size:12.5px;color:var(--ink-3);flex-wrap:wrap}
.foot-links a{text-decoration:none;color:var(--ink-3);transition:color .2s}
.foot-links a:hover{color:var(--accent)}
.foot-meta{font-size:11.5px;color:var(--ink-3);line-height:1.9;text-align:right}
.foot-meta a{color:var(--ink-3);text-decoration:none}
.foot-meta a:hover{color:var(--accent)}
.foot-word{
  margin-top:22px;font-family:var(--latin);font-weight:700;
  font-size:clamp(64px,15.4vw,210px);line-height:.78;letter-spacing:-.045em;
  color:transparent;-webkit-text-stroke:1px var(--ink-3);
  opacity:.3;user-select:none;pointer-events:none;
  margin-bottom:-.14em;
}

.back-to-top{
  position:fixed;right:26px;bottom:28px;z-index:950;
  width:42px;height:42px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid var(--stroke-strong);background:var(--glass-2);
  color:var(--ink);cursor:pointer;
  backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);
  box-shadow:var(--edge),var(--shadow-1);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease,border-color .2s,color .2s,box-shadow .25s;
}
.back-to-top.visible{opacity:1;transform:none;pointer-events:auto}
.back-to-top:hover{border-color:var(--accent);color:var(--accent);box-shadow:var(--glow)}
.back-to-top:active{transform:scale(.93)}
.back-to-top svg{width:17px;height:17px}

/* ==================== 入场 ==================== */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .8s ease,transform .8s cubic-bezier(.16,1,.3,1);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* ==================== 主题切换圆形扩散 ==================== */
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}
::view-transition-new(root){
  clip-path:circle(0 at var(--vt-x,50%) var(--vt-y,50%));
  animation:vtReveal .6s cubic-bezier(.16,1,.3,1) forwards;
}
@keyframes vtReveal{to{clip-path:circle(var(--vt-r,120vmax) at var(--vt-x,50%) var(--vt-y,50%))}}

/* ==================== 法务页兜底（保持可用） ==================== */
.legal-page{padding:140px 0 40px}
.legal-card{background:var(--glass)}

/* ==================== 响应式 ==================== */
@media(max-width:1080px){
  :root{--pad:22px}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(0,.92fr);gap:20px}
  .stage{max-width:480px}
  .fcard-lg{grid-column:span 6}
  .fcard-wide{grid-column:span 6}
  .fcard-mid{grid-column:span 6}
  .fcard-sm{grid-column:span 6}
  .fcard-quarter{grid-column:span 6}
}

@media(max-width:960px){
  .sec{padding:88px 0}
  .sec-head{grid-template-columns:1fr;gap:12px;margin-bottom:38px;align-items:start}
  .sec-head .sub{max-width:38em}
  .hero{padding:116px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-copy{max-width:640px}
  .stage{display:none}
  .hero-mobile{display:block;margin-top:8px}
  .dl{grid-template-columns:1fr}
  .dl-left{border-right:none;border-bottom:1px solid var(--hairline);padding:30px 26px}
  .dl-right{padding:16px}
  .community-inner{grid-template-columns:1fr;padding:26px 24px}
}

@media(max-width:860px){
  :root{--pad:22px;--nav-h:56px}
  body{font-size:14.5px}
  .navbar{padding:10px 18px}
  .nav-content{padding:0 8px 0 16px;height:52px;background:transparent!important;border-color:transparent!important;box-shadow:none!important;backdrop-filter:none!important}
  .navbar.scrolled .nav-content{
    background:var(--nav-strong)!important;border-color:var(--stroke)!important;
    backdrop-filter:blur(22px) saturate(1.7)!important;-webkit-backdrop-filter:blur(22px) saturate(1.7)!important;
    box-shadow:var(--edge),0 14px 30px -24px rgba(13,20,34,.6)!important;
  }
  .nav-links{display:none}
  .logo-icon{width:28px;height:28px}
  .logo em{font-size:11.5px;display:inline}
  .theme-toggle{width:36px;height:36px}
  .hamburger{display:flex}

  /* 底部 Dock */
  .dock{
    display:grid;grid-template-columns:repeat(4,1fr);gap:2px;
    position:fixed;left:14px;right:14px;bottom:calc(10px + env(safe-area-inset-bottom));
    z-index:990;padding:6px;border-radius:22px;
    background:var(--nav-bg);border:1px solid var(--stroke);
    box-shadow:var(--edge),0 22px 44px -24px rgba(13,20,34,.5);
    backdrop-filter:blur(24px) saturate(1.7);-webkit-backdrop-filter:blur(24px) saturate(1.7);
  }
  .dock a{
    display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:7px 0 5px;border-radius:16px;text-decoration:none;
    color:var(--ink-3);font-size:10px;font-weight:550;letter-spacing:.02em;
    transition:color .25s ease,background-color .25s ease;
  }
  .dock a svg{width:20px;height:20px;stroke-width:1.6}
  .dock a.on{color:var(--accent);background:var(--accent-soft)}

  .hero{padding:96px 0 44px}
  .hero-title{font-size:clamp(34px,9.4vw,46px);letter-spacing:-.035em}
  .hero-sub{font-size:14px;margin-bottom:26px}
  .hero-cta{margin-bottom:30px}
  .hero-cta .btn{height:46px;padding:0 20px;font-size:14px}
  .hero-cta .btn-ghost{flex:0 0 auto}
  .eyebrow{font-size:11.5px;margin-bottom:22px;padding:6px 12px 6px 10px}
  .stats>div{padding:0 14px}
  .stats dd{font-size:21px}
  .stats dt{font-size:9.5px;letter-spacing:.12em}
  .back-to-top{bottom:calc(84px + env(safe-area-inset-bottom));right:16px;width:38px;height:38px}

  .sec{padding:64px 0}
  .sec-head{margin-bottom:30px;gap:10px}
  .sec-tag{font-size:10px}
  .sec-head h2{font-size:clamp(24px,7vw,30px)}
  .sec-head .sub{font-size:13px}

  /* 功能：手风琴 */
  .features-grid{display:flex;flex-direction:column;gap:9px}
  .fcard,.fcard-lg,.fcard-wide,.fcard-mid,.fcard-sm,.fcard-quarter{
    grid-column:auto;display:block;padding:0;border-radius:16px;
  }
  .fcard:hover{transform:none;box-shadow:var(--edge),var(--shadow-1)}
  .fc-head{
    display:flex;align-items:center;gap:11px;
    padding:15px 16px;margin:0;position:relative;
  }
  .fc-num{font-size:10.5px;color:var(--accent);letter-spacing:.1em;flex:0 0 auto;opacity:.9}
  .fc-title{font-size:15px;flex:1 1 auto;letter-spacing:-.01em;font-weight:640;grid-column:auto}
  .fc-kicker{display:none}
  .fc-toggle{
    display:flex;position:absolute;inset:0;align-items:center;justify-content:flex-end;
    padding:0 16px;background:none;border:0;cursor:pointer;color:var(--ink-3);
    font-family:var(--sans);-webkit-tap-highlight-color:transparent;
  }
  .fc-toggle .chev{width:16px;height:16px;transition:transform .45s cubic-bezier(.16,1,.3,1),color .25s}
  .fcard.open .fc-toggle .chev{transform:rotate(180deg);color:var(--accent)}
  .fc-body{grid-template-rows:0fr;transition:grid-template-rows .45s cubic-bezier(.16,1,.3,1)}
  .fcard.open .fc-body{grid-template-rows:1fr}
  .fc-inner{padding:0 16px 16px}
  .fc-inner p{font-size:12.5px;margin-bottom:12px;max-width:none}
  .fc-vis{margin-top:0;min-height:0;flex:0 0 auto}
  .fcard-lg .fc-vis{min-height:0}
  .fcard-lg .vi-grid span{height:16px}
  .fcard-lg .fc-inner p{font-size:12.5px}
  .vis-import{padding-bottom:0}

  /* 预览 */
  .reel-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:6px}
  .reel-cap h3{font-size:19px}
  .reel-cap p{font-size:12px}
  .reel-ctrl{align-self:flex-end}
  .reel{gap:16px;padding:12px calc(50% - 26vw) 26px}
  .shot{width:52vw;max-width:212px}
  .reel-dots{margin-top:8px}
  .reel-hint{display:none}

  /* 下载 */
  .dl-left{padding:26px 20px}
  .dl-left h3{font-size:24px}
  .dl-actions .btn{flex:1 1 auto}
  .dl-right{padding:12px}
  .dl-item{padding:13px 14px;gap:12px}
  .dl-item .ico{width:36px;height:36px}
  .dl-item b{font-size:13.5px}
  .dl-tip{display:none}

  .community-inner{padding:22px 20px;gap:16px}
  .community-links .btn{flex:1 1 auto;justify-content:center}

  footer{padding:38px 0 96px}
  .foot-grid{flex-direction:column;gap:16px}
  .foot-meta{text-align:left}
  .foot-links{gap:14px}
  .foot-word{margin-top:16px;font-size:23vw;opacity:.35;margin-bottom:0}

  .mobile-menu{top:76px;right:14px}
  .legal-page{padding:112px 0 30px}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .hero-title .ln>span{transform:none}
  .swash svg{stroke-dashoffset:0}
  .hero-sub,.hero-cta,.stats{opacity:1}
}

/* ==================== 支持 / 赞赏 ==================== */
.support-grid{
  display:grid;grid-template-columns:minmax(0,.68fr) minmax(0,1fr);
  gap:20px;align-items:stretch;
}
.support-buy{
  padding:24px 22px;display:grid;gap:14px;align-content:center;justify-items:center;
  text-align:center;
}
.sp-qr{
  width:min(84%,400px);max-width:100%;height:auto;display:block;
  border-radius:18px;box-shadow:var(--shadow-1);
}
.sp-buy-meta{display:grid;gap:6px;justify-items:center;min-width:0}
.sp-buy-meta strong{font-size:16px;font-weight:600;letter-spacing:-.01em}
.sp-buy-meta span{font-size:13px;line-height:1.65;color:var(--ink-3);max-width:27ch}

.support-list{display:grid;overflow:hidden;min-height:452px;grid-template-rows:auto 1fr auto}
.sp-head{
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  padding:16px 20px 12px;border-bottom:1px solid var(--hairline);
}
.sp-title{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.sp-hint{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.sp-items{
  list-style:none;margin:0;padding:8px;display:grid;gap:2px;
}
.sp-item{
  display:grid;grid-template-columns:36px minmax(0,1fr) auto;
  gap:12px;align-items:center;padding:11px 10px;border-radius:14px;
  transition:background .25s ease;
}
.sp-item:hover{background:var(--accent-soft)}
.sp-avatar{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  font-size:14px;font-weight:600;line-height:1;
  color:var(--ci-azure);background:var(--c-azure);
  border:1px solid rgba(255,255,255,.5);
}
.sp-main{min-width:0}
.sp-row{display:flex;align-items:baseline;gap:10px}
.sp-name{
  font-size:14px;font-weight:600;letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.sp-amount{
  margin-left:auto;font-size:13px;color:var(--accent);
  font-variant-numeric:tabular-nums;white-space:nowrap;
}
.sp-remark{
  margin:3px 0 0;font-size:12.5px;line-height:1.5;color:var(--ink-3);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.sp-time{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;white-space:nowrap}
.sp-empty{margin:0;padding:26px 20px;font-size:13px;color:var(--ink-3)}
.sp-pager{
  display:flex;align-items:center;justify-content:center;gap:14px;
  padding:12px 16px 14px;border-top:1px solid var(--hairline);
}
.sp-page{
  appearance:none;border:1px solid var(--stroke-strong);background:var(--glass-2);
  color:var(--ink-2);font:inherit;font-size:12.5px;line-height:1;
  padding:7px 13px;border-radius:999px;cursor:pointer;
  transition:color .25s ease,border-color .25s ease,opacity .25s ease;
}
.sp-page:hover:not(:disabled){color:var(--accent);border-color:var(--accent)}
.sp-page:disabled{opacity:.38;cursor:default}
.sp-page-info{font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.sp-page-info b{color:var(--ink);font-weight:600}

@media (max-width:860px){
  .support-grid{grid-template-columns:1fr}
}
@media (max-width:520px){
  /* 手机：竖排，二维码占满卡片宽度，好扫 */
  .support-buy{
    grid-template-columns:1fr;justify-items:center;
    align-content:center;text-align:center;padding:20px 18px;gap:14px;
  }
  .sp-qr{width:min(74vw,300px);max-width:100%;border-radius:16px}
  .sp-buy-meta{justify-items:center}
  .sp-buy-meta strong{font-size:15px}
  .sp-buy-meta span{max-width:24ch;font-size:12.5px}
  .support-list{min-height:0}
  .sp-item{padding:10px 8px;grid-template-columns:32px minmax(0,1fr) auto}
  .sp-avatar{width:32px;height:32px;border-radius:10px;font-size:13px}
  .sp-page{padding:6px 11px;font-size:12px}
  .sp-pager{gap:10px;padding:10px 12px 12px}
}