/* Lumlook — 官网样式 */
:root {
  --bg: #060608;
  --ink: #0b0b10;
  --tx: #f5f2ea;
  --tx-dim: rgba(245, 242, 234, .56);
  --tx-faint: rgba(245, 242, 234, .32);
  --amber: #ffb45e;
  --line: rgba(245, 242, 234, .14);
  --ease-out: cubic-bezier(.23, 1, .32, 1);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "思源宋体", "Noto Serif CJK SC", serif;
  --font-mono: "Cascadia Mono", ui-monospace, Consolas, monospace;
  --gutter: clamp(24px, 6vw, 96px);
  color-scheme: dark;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { background: var(--bg); }
html, body { overflow-x: hidden; }
body { font-family: var(--font-sans); color: var(--tx); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: rgba(255, 180, 94, .3); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .32em; color: var(--amber); }

/* ---------- 头部 ---------- */
.site-head {
  position: fixed; inset-inline: 0; top: 0; z-index: 70;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 3vw, 36px);
  background: linear-gradient(rgba(6, 6, 8, .5), transparent);
}
.logo { display: block; color: var(--tx); --o: var(--amber); }
.logo svg { display: block; height: 20px; aspect-ratio: 2522 / 374; fill: currentColor; }
.site-nav { position: absolute; left: 50%; transform: translateX(-50%); }
.site-nav a {
  margin: 0 clamp(10px, 1.6vw, 22px); font-size: 14px; color: var(--tx-dim);
  transition: color .15s var(--ease-out);
}
.site-nav a.is-on { color: var(--tx); }
.head-act { display: flex; align-items: center; gap: 10px; }
.head-login {
  padding: 10px 6px; font-size: 14px; color: var(--tx-dim);
  transition: color .15s var(--ease-out);
}
.head-signup { border-color: rgba(255, 180, 94, .42); color: var(--amber); }
.head-dl { display: inline-flex; align-items: center; gap: 7px; }
.head-dl svg {
  width: 15px; height: 15px; fill: none; stroke: currentColor;
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
.cta {
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 18px;
  font-size: 14px; transition: background-color .15s var(--ease-out), transform .12s var(--ease-out);
}
.cta:active { transform: scale(.97); }
/* 页脚这颗压在流光上，做成毛玻璃：背后的光被磨开，字才浮得起来 */
.cta-big {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 16px; padding: 15px 30px;
  border-color: rgba(255, 224, 190, .28);
  background: rgba(255, 255, 255, .07);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .16), 0 12px 34px rgba(0, 0, 0, .3);
}
/* 不支持 backdrop-filter 时退回一层实底，别变成一颗透明框 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .cta-big { background: rgba(28, 22, 20, .72); }
}
.cta-big svg {
  width: 18px; height: 18px; fill: none; stroke: var(--amber);
  stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}
@media (hover: hover) and (pointer: fine) {
  .site-nav a:hover { color: var(--tx); }
  .cta:hover { background: rgba(255, 255, 255, .07); }
  .cta-big:hover { background: rgba(255, 255, 255, .15); border-color: rgba(255, 224, 190, .48); }
  .head-login:hover { color: var(--tx); }
  .head-signup:hover { background: rgba(255, 180, 94, .12); }
  /* 光加速的同时边框也亮一档，反馈才落得实（提速在 glbg.js 的 hot 里） */
  .hero-dl:hover { border-color: rgba(255, 180, 94, .5); }
}

/* ---------- WebGL 流光背景（现只用于页脚） ---------- */
.glbg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

/* ---------- 光斑（deck 各屏视频下的底色） ---------- */
.blob {
  position: absolute; border-radius: 50%; mix-blend-mode: screen;
  will-change: transform;
}
.b1 { width: 70vmax; height: 70vmax; left: -15vmax; top: -12vmax; animation: drift1 26s ease-in-out infinite alternate; }
.b2 { width: 55vmax; height: 55vmax; right: -18vmax; bottom: -20vmax; animation: drift2 32s ease-in-out infinite alternate; }
.b3 { width: 38vmax; height: 38vmax; left: 32%; bottom: -14vmax; animation: drift3 21s ease-in-out infinite alternate; }
@keyframes drift1 { from { transform: translate(-6%, 4%) scale(1); } to { transform: translate(7%, -6%) scale(1.18); } }
@keyframes drift2 { from { transform: translate(5%, -3%) scale(1.1); } to { transform: translate(-8%, 6%) scale(.95); } }
@keyframes drift3 { from { transform: translate(-4%, 6%) scale(.9); } to { transform: translate(9%, -8%) scale(1.12); } }

/* ---------- A · 首屏 ---------- */
.hero { position: relative; height: 100vh; min-height: 640px; overflow: hidden; }
/* pills 切色仍作用在整层上，只是被切色的从渐变换成了成片 */
.sky {
  position: absolute; inset: 0; background: #08070d;
  filter: hue-rotate(var(--hue, 0deg)); transition: filter .8s var(--ease-out);
}
/* 压暗是编码时就做掉的（暗画面码率需求低得多），这里只做轻微调色 */
.hero-video {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: saturate(.9) contrast(1.04);
}
/* 压出字标的可读性：四周收暗留中心一点光，底部一路压到黑接住下一屏 */
.sky::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(6, 6, 8, .66) 0%, transparent 24%, transparent 46%, rgba(6, 6, 8, .97) 100%),
    radial-gradient(78% 64% at 50% 42%, transparent, rgba(6, 6, 8, .58) 100%);
}

.hero-inner { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; z-index: 2; }
.hero-title { margin-top: 18px; color: var(--tx); --o: var(--amber); }
.hero-title svg {
  display: block; width: min(76vw, 860px); aspect-ratio: 2522 / 374;
  fill: currentColor; filter: drop-shadow(0 0 55px rgba(255, 180, 94, .35));
}
.hero-sub { margin-top: 26px; font-size: clamp(18px, 2.2vw, 30px); color: var(--tx-dim); letter-spacing: .08em; }

/* 客户端下载：胶囊内跑一层 WebGL 流光（见 glbg.js 的 dl 调色板） */
.hero-dl {
  position: relative; overflow: hidden; justify-self: center; margin-top: 38px;
  border-radius: 999px; border: 1px solid rgba(245, 242, 234, .16); background: #0c0910;
  transition: border-color .2s var(--ease-out), transform .12s var(--ease-out);
}
.hero-dl:active { transform: scale(.985); }
/* 只压住图标与文字那一小段，越往右越放开，流光要走满大半颗胶囊才看得出在动 */
.hero-dl::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(100deg,
    rgba(8, 7, 12, .93) 0%, rgba(8, 7, 12, .82) 20%, rgba(8, 7, 12, .5) 42%, rgba(8, 7, 12, .16) 68%, transparent 92%);
}
.hero-dl-in {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 13px; padding: 13px 108px 13px 26px;
}
.hero-dl svg {
  width: 19px; height: 19px; flex: none;
  fill: none; stroke: var(--amber); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
  filter: drop-shadow(0 0 6px rgba(8, 7, 12, .95));
}
/* 遮罩放开后光会淌到文字底下，字靠自己的投影站住 */
.hero-dl-tx {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left;
  text-shadow: 0 0 5px rgba(8, 7, 12, .95), 0 0 14px rgba(8, 7, 12, .8);
}
.hero-dl-tx b { font-size: 16px; font-weight: 600; letter-spacing: .02em; }
.hero-dl-tx i {
  font-style: normal; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .18em; color: rgba(245, 242, 234, .7);
}
/* 背景是活动画面，最亮的那几帧要靠阴影保住小字 */
.hero-inner .kicker, .hero-sub { text-shadow: 0 0 30px rgba(6, 6, 8, .9); }

.hero-meta { position: absolute; bottom: 40px; z-index: 3; font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em; color: var(--tx-faint); }
.hero-meta.left { left: var(--gutter); }
.hero-meta.right { right: var(--gutter); }

.hero-foot {
  position: absolute; inset-inline: 0; bottom: 34px; z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 22px;
}
.pills { display: flex; gap: 10px; padding: 6px; border: 1px solid var(--line); border-radius: 999px; background: rgba(6, 6, 8, .35); backdrop-filter: blur(10px); }
.pill {
  padding: 9px 20px; border-radius: 999px; font-size: 14px; color: var(--tx-dim);
  transition: color .15s var(--ease-out), background-color .15s var(--ease-out), transform .12s var(--ease-out);
}
.pill:active { transform: scale(.96); }
.pill.is-on { color: #1a1108; background: var(--amber); font-weight: 600; }
.scroll-hint { display: flex; flex-direction: column; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .38em; color: var(--tx-faint); }
.scroll-hint i { width: 1px; height: 52px; background: linear-gradient(var(--tx-dim), transparent); overflow: hidden; position: relative; }
.scroll-hint i::after {
  content: ""; position: absolute; inset: 0; background: linear-gradient(var(--amber), transparent);
  transform: translateY(-100%); animation: hintdrop 2.2s var(--ease-out) infinite;
}
@keyframes hintdrop { 0% { transform: translateY(-100%); } 60% { transform: translateY(100%); } 100% { transform: translateY(100%); } }

/* ---------- 宣言 · 三维机位「画幅堆叠」 ---------- */
/* 高度由 ScrollTrigger 的 pin 撑开（reduced 下不 pin，就是普通一屏） */
.statement {
  position: relative; height: 100vh;
  background: radial-gradient(50% 35% at 50% 50%, rgba(255, 154, 60, .07), transparent 70%), var(--bg);
}
.statement-stage { position: relative; height: 100%; overflow: hidden; }
/* 红色差：与 preview 一致的 1.1px 错位描边 */
.statement-art {
  position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1;
  filter: drop-shadow(1.1px 0 0 rgba(255, 80, 80, .24));
}
.statement-inner {
  position: absolute; inset: 0; z-index: 2; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  padding: 0 var(--gutter); pointer-events: none;
}
.statement h2 {
  font-size: clamp(44px, 7vw, 110px); font-weight: 800; letter-spacing: -.02em; line-height: 1.22;
  text-shadow: 0 0 46px rgba(6, 6, 8, .7);
}
.statement h2 .l1, .statement h2 .l2 { display: inline-block; }
.statement h2 .l2 { color: var(--tx); }
.statement .ch { display: inline-block; }
.statement-meta {
  margin-top: 42px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .3em;
  color: var(--tx-faint); text-shadow: 0 0 26px rgba(6, 6, 8, .8);
}

/* ---------- B/C/D · 卡片滑入区 ---------- */
.deck { position: relative; height: 100vh; overflow: hidden; background: var(--bg); }
.slide {
  position: absolute; inset: 0; overflow: hidden; background: var(--ink);
  will-change: transform; box-shadow: -40px 0 120px rgba(0, 0, 0, .55);
}
.slide:not(:first-child) { transform: translateX(104%); }
.slide-visual { position: absolute; inset: 0; }
.slide-visual video {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.slide-visual::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(78deg, rgba(0, 0, 0, .55) 0%, transparent 52%),
    radial-gradient(120% 90% at 50% 40%, transparent 52%, rgba(0, 0, 0, .6) 100%);
}
.slide-shade { position: absolute; inset: 0; z-index: 3; background: #000; opacity: 0; pointer-events: none; }

.slide[data-theme="dawn"] .slide-visual { background: linear-gradient(180deg, #0d0a12 0%, #221016 60%, #331519 100%); }
.slide[data-theme="dawn"] .b1 { background: radial-gradient(circle at 40% 40%, rgba(255, 154, 60, .6), transparent 65%); }
.slide[data-theme="dawn"] .b2 { background: radial-gradient(circle at 55% 45%, rgba(255, 93, 115, .42), transparent 65%); }
.slide[data-theme="dawn"] .b3 { background: radial-gradient(circle at 50% 50%, rgba(255, 214, 140, .3), transparent 65%); }

.slide[data-theme="dusk"] .slide-visual { background: linear-gradient(180deg, #070b14 0%, #0b1626 60%, #0e2030 100%); }
.slide[data-theme="dusk"] .b1 { background: radial-gradient(circle at 40% 40%, rgba(64, 156, 255, .5), transparent 65%); }
.slide[data-theme="dusk"] .b2 { background: radial-gradient(circle at 55% 45%, rgba(46, 224, 200, .32), transparent 65%); }
.slide[data-theme="dusk"] .b3 { background: radial-gradient(circle at 50% 50%, rgba(255, 170, 120, .28), transparent 65%); }

.slide[data-theme="night"] .slide-visual { background: linear-gradient(180deg, #0a0812 0%, #150d26 60%, #1d1030 100%); }
.slide[data-theme="night"] .b1 { background: radial-gradient(circle at 40% 40%, rgba(140, 92, 255, .5), transparent 65%); }
.slide[data-theme="night"] .b2 { background: radial-gradient(circle at 55% 45%, rgba(255, 92, 190, .3), transparent 65%); }
.slide[data-theme="night"] .b3 { background: radial-gradient(circle at 50% 50%, rgba(90, 110, 255, .32), transparent 65%); }

.slide[data-theme="engine"] .slide-visual { background: linear-gradient(180deg, #07110d 0%, #0b2018 60%, #0e2c1e 100%); }
.slide[data-theme="engine"] .b1 { background: radial-gradient(circle at 40% 40%, rgba(64, 224, 160, .42), transparent 65%); }
.slide[data-theme="engine"] .b2 { background: radial-gradient(circle at 55% 45%, rgba(70, 140, 255, .3), transparent 65%); }
.slide[data-theme="engine"] .b3 { background: radial-gradient(circle at 50% 50%, rgba(200, 255, 180, .22), transparent 65%); }

.slide-tag {
  position: absolute; right: var(--gutter); bottom: clamp(28px, 5vh, 48px); z-index: 5;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em; color: var(--tx-faint);
}

.slide-copy { position: absolute; left: var(--gutter); bottom: clamp(88px, 16vh, 160px); max-width: 580px; z-index: 4; }
.slide-copy h3 { margin-top: 16px; font-size: clamp(40px, 5.6vw, 84px); font-weight: 800; letter-spacing: -.02em; line-height: 1.15; }
.slide-desc { margin-top: 20px; font-size: clamp(15px, 1.3vw, 18px); line-height: 1.9; color: var(--tx-dim); max-width: 42ch; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.tag {
  padding: 7px 16px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 13px; color: var(--tx-dim);
}
.tag.is-on { color: var(--tx); border-color: rgba(255, 180, 94, .6); background: rgba(255, 180, 94, .09); }

.deck-counter {
  position: absolute; left: var(--gutter); bottom: clamp(28px, 5vh, 48px); z-index: 5;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--tx-faint);
  border-top: 1px solid var(--line); padding-top: 14px; min-width: 120px;
}
.counter-now { color: var(--tx); display: inline-block; }

/* ---------- 模型聚合 ---------- */
.models {
  position: relative; min-height: 100vh; padding: 18vh 0 0;
  display: flex; flex-direction: column; gap: clamp(36px, 6vh, 64px);
  background: radial-gradient(55% 40% at 50% 45%, rgba(64, 224, 160, .06), transparent 70%), var(--bg);
  overflow: hidden;
}
.models-head { text-align: center; padding: 0 var(--gutter); }
.models-head h2 { margin-top: 18px; font-size: clamp(40px, 6vw, 96px); font-weight: 800; letter-spacing: -.02em; line-height: 1.22; }
.models-desc { margin: 24px auto 0; max-width: 640px; font-size: clamp(15px, 1.3vw, 18px); line-height: 1.9; color: var(--tx-dim); }
/* 模型对焦转盘：两圈模型名反向缓转，仪表刻度 + 顶部指针定焦 */
.dial {
  position: relative; overflow: hidden; margin-top: auto;
  -webkit-mask-image: linear-gradient(90deg, transparent 2%, #000 24%, #000 76%, transparent 98%);
  mask-image: linear-gradient(90deg, transparent 2%, #000 24%, #000 76%, transparent 98%);
}
.dial svg { display: block; width: 100%; height: auto; }
.dial text { font-family: var(--font-mono); letter-spacing: .14em; }
.dial-g1 text { fill: rgba(245, 242, 234, .55); }
.dial-g2 text { fill: rgba(255, 180, 94, .42); }
.dial-ticks { fill: none; stroke: rgba(245, 242, 234, .14); stroke-width: 14; stroke-dasharray: 2 26; }
.dial-needle { stroke: var(--amber); stroke-width: 1.6; opacity: .9; }
.dial-dot { fill: var(--amber); }

/* ---------- 底部揭示 ---------- */
main { position: relative; z-index: 10; background: var(--bg); margin-bottom: 100vh; }
/* flow-root：把 main 的 margin-bottom 包进内容高度（否则 margin 塌陷逃逸，滚不到 footer） */
#smooth-content { display: flow-root; }
#smooth-wrapper { position: relative; z-index: 10; pointer-events: none; }
main, .site-head { pointer-events: auto; }
.site-foot {
  position: fixed; inset-inline: 0; bottom: 0; height: 100vh; z-index: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  background: radial-gradient(80% 55% at 50% 108%, rgba(255, 150, 60, .16), transparent 62%), var(--bg);
}
.foot-inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 30px; }
.site-foot h2 { font-size: clamp(40px, 7vw, 96px); font-weight: 800; letter-spacing: -.02em; line-height: 1.2; }
.foot-note { margin-top: -14px; font-size: 13px; color: var(--tx-dim); }
.foot-note a { color: var(--amber); border-bottom: 1px solid rgba(255, 180, 94, .35); }
.foot-legal { position: absolute; bottom: 26px; font-size: 12px; color: var(--tx-faint); z-index: 1; }

/* ---------- 胶片颗粒 ---------- */
.grain {
  position: fixed; inset: -100%; z-index: 80; pointer-events: none; opacity: .05;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E") repeat 0 0 / 280px;
  animation: grain 9s steps(8) infinite;
}
@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-8%, 6%); }
  50% { transform: translate(6%, -9%); }
  75% { transform: translate(-5%, -4%); }
}

/* ---------- 登录 / 注册面板 ---------- */
.auth { position: fixed; inset: 0; z-index: 100; }
.auth[hidden] { display: none; }
.auth-mask {
  position: absolute; inset: 0; background: rgba(4, 4, 6, .72); backdrop-filter: blur(8px);
  opacity: 0; transition: opacity .4s var(--ease-out);
}
.auth.is-on .auth-mask { opacity: 1; }

.auth-panel {
  position: absolute; inset: 0; display: grid; grid-template-columns: 1fr min(520px, 42vw);
  pointer-events: none;
}
.auth-panel > * { pointer-events: auto; }

/* 左半边：成片。面板一开就播，关掉就停。
   纯装饰，不吃点击——点左半边等于点遮罩，直接关掉 */
.auth-reel {
  position: relative; overflow: hidden; pointer-events: none;
  opacity: 0; transition: opacity .5s var(--ease-out);
}
.auth.is-on .auth-reel { opacity: 1; }
.auth-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
/* 右端一路压到面板底色，成片与表单之间不留硬边 */
.auth-reel::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg,
    rgba(6, 6, 8, .55), rgba(6, 6, 8, .06) 28%, rgba(11, 11, 16, .5) 78%, var(--ink) 100%);
}
.auth-reel-tag {
  position: absolute; left: 34px; bottom: 30px; z-index: 1;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em; color: var(--tx-faint);
}

/* 右半边：表单，从右侧滑入 */
.auth-side {
  position: relative; background: var(--ink);
  display: flex; align-items: center; justify-content: center; padding: 40px 34px;
  overflow-y: auto; overscroll-behavior: contain;
  transform: translateX(100%); transition: transform .5s var(--ease-out);
}
.auth.is-on .auth-side { transform: none; }
.auth-x {
  position: absolute; top: 20px; right: 20px; width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-content: center; color: var(--tx-dim);
  transition: color .15s var(--ease-out), background-color .15s var(--ease-out);
}
.auth-x svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }

.auth-form-wrap { width: 100%; max-width: 340px; }
.auth-logo { display: block; color: var(--tx); --o: var(--amber); }
.auth-logo svg { display: block; width: 148px; aspect-ratio: 2522 / 374; fill: currentColor; }
.auth-side h2 { margin-top: 26px; font-size: 30px; font-weight: 700; letter-spacing: -.01em; }
.auth-sub { margin-top: 8px; font-size: 14px; color: var(--tx-dim); }

/* tab：滑块在两个按钮间移动，不用给按钮各自描边。
   选中态用实色块（不是半透明叠色），跟主按钮一个语言 */
.auth-tabs {
  position: relative; display: grid; grid-template-columns: 1fr 1fr; margin-top: 30px;
  padding: 4px; border-radius: 12px; background: #14141c;
}
.auth-thumb {
  position: absolute; top: 4px; left: 4px; width: calc(50% - 4px); height: calc(100% - 8px);
  border-radius: 9px; background: var(--tx);
  transition: transform .32s var(--ease-out);
}
.auth-tabs.is-signup .auth-thumb { transform: translateX(100%); }
.auth-tabs button {
  position: relative; padding: 10px 0; font-size: 14px; color: var(--tx-dim);
  transition: color .2s var(--ease-out);
}
.auth-tabs button[aria-selected="true"] { color: #12100c; font-weight: 600; }

.auth-form { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.auth-field {
  display: flex; align-items: center; gap: 8px; padding: 0 14px; height: 50px;
  border: 1px solid var(--line); border-radius: 12px; background: #0f0f15;
  transition: border-color .2s var(--ease-out);
}
.auth-field:focus-within { border-color: rgba(255, 180, 94, .5); }
.auth-ico { flex: none; width: 15px; height: 15px; fill: none; stroke: var(--tx-faint); stroke-width: 1.6; stroke-linejoin: round; }
.auth-cc {
  flex: none; padding: 0 20px 0 0; margin-right: 4px; border: 0; border-right: 1px solid var(--line);
  color: var(--tx); font: inherit; font-size: 14px; cursor: pointer;
  appearance: none; -webkit-appearance: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23f5f2ea' stroke-opacity='.45' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 8px center / 9px 6px;
}
.auth-cc option { background: var(--ink); }
.auth-field input {
  flex: 1; min-width: 0; border: 0; background: none; color: var(--tx); font: inherit; font-size: 15px;
}
.auth-field input::placeholder { color: var(--tx-faint); }
.auth-field input:focus { outline: none; }
.auth-send {
  flex: none; padding: 7px 12px; border-radius: 8px; font-size: 13px; font-weight: 600;
  color: #12100c; background: var(--tx); transition: opacity .15s var(--ease-out);
}
.auth-send[disabled] { color: var(--tx-faint); background: #17171d; cursor: default; }

.auth-msg { min-height: 17px; font-size: 12px; line-height: 17px; color: var(--tx-faint); }
.auth-msg.is-bad { color: #ff8f7a; }
.auth-go {
  height: 50px; border-radius: 12px; font-size: 15px; font-weight: 600; color: #1a1108;
  background: var(--amber); transition: filter .15s var(--ease-out), transform .12s var(--ease-out);
}
.auth-go:active { transform: scale(.985); }

.auth-or {
  display: flex; align-items: center; gap: 14px; margin: 22px 0 16px;
  font-size: 12px; color: var(--tx-faint);
}
.auth-or::before, .auth-or::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.auth-oauth { display: flex; flex-direction: column; gap: 10px; }
.auth-oa {
  display: flex; align-items: center; justify-content: center; gap: 10px; height: 48px;
  border: 1px solid var(--line); border-radius: 12px; font-size: 14px; color: var(--tx);
  transition: background-color .15s var(--ease-out), transform .12s var(--ease-out);
}
.auth-oa:active { transform: scale(.985); }
.auth-oa svg { width: 18px; height: 18px; flex: none; }

.auth-legal { margin-top: 22px; font-size: 12px; line-height: 1.7; color: var(--tx-faint); text-align: center; }
.auth-legal a { color: var(--tx-dim); text-decoration: underline; text-underline-offset: 2px; }

@media (hover: hover) and (pointer: fine) {
  .auth-x:hover { color: var(--tx); background: rgba(255, 255, 255, .06); }
  .auth-tabs button:hover { color: var(--tx); }
  .auth-send:not([disabled]):hover { opacity: .8; }
  .auth-go:hover { filter: brightness(1.06); }
  .auth-oa:hover { background: rgba(255, 255, 255, .06); }
  .auth-legal a:hover { color: var(--tx); }
}

/* ---------- 大标题：思源宋体（电影海报感） ---------- */
.statement h2, .slide-copy h3, .models-head h2, .site-foot h2 {
  font-family: var(--font-serif); font-weight: 900; letter-spacing: normal;
}

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .site-nav { display: none; }
  .hero-meta { display: none; }
  .slide-copy { right: var(--gutter); max-width: none; }
  .slide-tag { display: none; }
  .dial svg { width: 240%; margin-left: -70%; }
  /* 竖屏画幅窄，宣言字号收一档，给三维画幅让出左右空间 */
  .statement h2 { font-size: clamp(38px, 11vw, 64px); }
  .statement-meta { margin-top: 30px; font-size: 9px; letter-spacing: .16em; }
  /* 头部挤不下三个动作：注册收进面板的 tab 里 */
  .head-signup { display: none; }
  .head-act { gap: 4px; }
  /* 面板占满整屏，成片那半边让位给表单 */
  .auth-panel { grid-template-columns: 1fr; }
  .auth-reel { display: none; }
  .auth-side { border-left: 0; padding: 76px 24px 40px; align-items: flex-start; }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  .blob, .grain, .scroll-hint i::after { animation: none; }
  .deck { height: auto; overflow: visible; }
  .slide { position: relative; inset: auto; height: 100vh; transform: none !important; }
  .deck-counter { display: none; }
  /* 不 pin、不滚动运镜，三维画面只画一帧终局 */
  .statement { height: 100vh; }
}