/* =========================================================
   NSNEKO · Brett — Hero
   零外部依赖：系统字体 + 纯 CSS/Canvas，国内访问无 CDN 等待
   ========================================================= */

:root {
  --bg:        #07070b;
  --fg:        #f4f4f6;
  --muted:     rgba(244, 244, 246, .58);
  --muted-2:   rgba(244, 244, 246, .34);
  --line:      rgba(255, 255, 255, .10);
  --line-2:    rgba(255, 255, 255, .055);
  --card-bg:   linear-gradient(180deg, rgba(255,255,255,.048), rgba(255,255,255,.014));

  --a:         #7c8cff;   /* 靛蓝 */
  --b:         #45e0d0;   /* 青   */

  --maxw:      1180px;
  --radius:    18px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
          "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

::selection { background: rgba(124, 140, 255, .35); color: #fff; }

/* ===================== 滚动进度条 ===================== */

.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  height: 2px;
  pointer-events: none;
}
.progress span {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--a), var(--b));
  box-shadow: 0 0 14px rgba(124, 140, 255, .7);
}

/* ===================== 背景 ===================== */

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--bg);
}

/* 极光：三层径向渐变，缓慢漂移 */
.bg-aurora {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(720px 520px at 14% 4%,  rgba(124, 140, 255, .30), transparent 62%),
    radial-gradient(660px 460px at 86% 10%, rgba(69, 224, 208, .17), transparent 64%),
    radial-gradient(900px 620px at 50% 112%, rgba(124, 140, 255, .16), transparent 62%);
  animation: aurora 26s ease-in-out infinite alternate;
  will-change: transform;
}

@keyframes aurora {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(0, -3.5%, 0) scale(1.07); }
}

/* 粒子星座画布（内容由 main.js 绘制） */
.bg-stars {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  -webkit-mask-image: radial-gradient(ellipse 96% 82% at 50% 34%, #000 20%, transparent 88%);
          mask-image: radial-gradient(ellipse 96% 82% at 50% 34%, #000 20%, transparent 88%);
}

/* 细网格，向下淡出 */
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right,  rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(ellipse 90% 68% at 50% 22%, #000 8%, transparent 78%);
          mask-image: radial-gradient(ellipse 90% 68% at 50% 22%, #000 8%, transparent 78%);
}

/* 胶片噪点（内联 SVG，无外部请求） */
.bg-noise {
  position: absolute;
  inset: 0;
  opacity: .035;
  mix-blend-mode: overlay;
  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='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.bg-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 90% at 50% 45%, transparent 42%, rgba(0,0,0,.62) 100%);
}

/* ===================== 光标光斑 ===================== */

.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  z-index: 0;
  width: 560px;
  height: 560px;
  margin: -280px 0 0 -280px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .6s ease;
  mix-blend-mode: screen;
  background: radial-gradient(circle,
              rgba(124, 140, 255, .12),
              rgba(69, 224, 208, .05) 40%,
              transparent 68%);
  will-change: transform;
}
.cursor-glow.on { opacity: 1; }

/* ===================== 导航 ===================== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  /* 全宽 + 内边距对齐内容栏，滚动时背景才能铺满整行 */
  padding: 22px max(28px, calc((100% - var(--maxw)) / 2));
  border-bottom: 1px solid transparent;
  transition: background-color .35s ease, border-color .35s ease;
}

/* 滚动后浮出毛玻璃底板，避免文字从导航下面穿过 */
.nav.is-scrolled {
  background: rgba(7, 7, 11, .74);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
          backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--muted);
  transition: color .25s;
}
.brand:hover { color: var(--fg); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--fg);
}

.brand-name { font-weight: 600; }

.nav-links {
  display: flex;
  gap: 26px;
  font-size: 13.5px;
  letter-spacing: .05em;
  color: var(--muted);
}
.nav-links a {
  position: relative;
  transition: color .25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: -5px;
  height: 1px;
  background: linear-gradient(90deg, var(--a), var(--b));
  transition: right .3s cubic-bezier(.16,.84,.44,1);
}
.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after { right: 0; }

/* ===================== HERO ===================== */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  min-height: 100svh;
  padding: 132px 28px 104px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  align-items: center;
  gap: 64px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
}

.eyebrow {
  margin-bottom: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted-2);
}

/* —— 主标题 —— */
.title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 20px;
  margin-bottom: 22px;
  line-height: 1.02;
}

/* 注意：这里刻意不用 background-clip:text ——
   逐字动画给 .ch 加了 transform，会把子元素提升为独立合成层，
   与父级背景裁剪冲突，导致文字不可见。纯色 + 光晕更稳。 */
.title-main {
  font-size: clamp(2.9rem, 7.2vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -.015em;
  color: #ffffff;
  text-shadow: 0 0 46px rgba(124, 140, 255, .38);
}

/* 逐字入场（JS 拆字） */
.title-main .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(.4em) rotate(5deg);
  animation: chIn .82s cubic-bezier(.16,.84,.44,1) forwards;
  animation-delay: calc(.22s + var(--i, 0) * .055s);
  will-change: transform, opacity;
}

@keyframes chIn {
  to { opacity: 1; transform: none; }
}

.title-sub {
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  font-weight: 650;
  letter-spacing: .015em;
  background: linear-gradient(100deg, var(--a) 6%, var(--b) 78%);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

/* —— 打字机角色 —— */
.role {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 22px;
  font-size: clamp(.95rem, 1.3vw, 1.06rem);
  letter-spacing: .04em;
  color: var(--muted);
  min-height: 1.6em;
}

.role-pre { opacity: .62; }

.type {
  font-weight: 650;
  color: var(--fg);
}

.caret {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  margin-left: -5px;
  translate: 0 2px;
  background: var(--b);
  box-shadow: 0 0 10px rgba(69, 224, 208, .9);
  animation: caret 1.05s step-end infinite;
}

@keyframes caret {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* —— 文案 —— */
.lede {
  max-width: 30em;
  font-size: clamp(1rem, 1.42vw, 1.14rem);
  line-height: 1.85;
  color: rgba(244, 244, 246, .80);
}

.lede-en {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted-2);
}

/* —— 按钮 —— */
.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .03em;
  cursor: pointer;
  transition: transform .28s cubic-bezier(.16,.84,.44,1),
              box-shadow .28s, border-color .28s, background-color .28s;
  will-change: transform;
}

.btn--primary {
  background: linear-gradient(100deg, var(--a), var(--b));
  color: #07070b;
  box-shadow: 0 10px 34px -12px rgba(124, 140, 255, .75);
}
.btn--primary:hover {
  box-shadow: 0 16px 42px -12px rgba(124, 140, 255, .9);
}
.btn--primary svg { transition: translate .3s cubic-bezier(.16,.84,.44,1); }
.btn--primary:hover svg { translate: 3px 0; }

.btn--ghost {
  border-color: var(--line);
  background: rgba(255,255,255,.03);
  color: var(--fg);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  border-color: rgba(255,255,255,.24);
  background: rgba(255,255,255,.07);
}

.btn:focus-visible {
  outline: 2px solid var(--b);
  outline-offset: 3px;
}

/* —— 状态 —— */
.status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 28px;
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--muted-2);
}

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--b);
  box-shadow: 0 0 0 0 rgba(69, 224, 208, .55);
  animation: pulse 2.6s ease-out infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(69,224,208,.5); }
  70%  { box-shadow: 0 0 0 11px rgba(69,224,208,0); }
  100% { box-shadow: 0 0 0 0 rgba(69,224,208,0); }
}

/* ===================== 头像区（圆角方卡片） ===================== */

.hero-media {
  position: relative;
  display: grid;
  place-items: center;
  justify-self: center;
  padding: 26px;
}

/* 3D 倾斜容器（由 main.js 更新 transform） */
.tilt {
  position: relative;
  display: grid;
  place-items: center;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.16,.84,.44,1);
  will-change: transform;
}

/* 卡片：3px 渐变描边 + 圆角 */
.avatar-frame {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: min(320px, 62vw);
  aspect-ratio: 1;
  padding: 3px;
  border-radius: 30px;
  background: conic-gradient(from 200deg,
              rgba(124,140,255,.92), rgba(69,224,208,.78),
              rgba(124,140,255,.16), rgba(69,224,208,.52),
              rgba(124,140,255,.92));
  box-shadow: 0 34px 84px -34px rgba(124,140,255,.6);
}

.avatar-frame > * {
  grid-area: 1 / 1;
  width: 100%;
  height: 100%;
  border-radius: 27px;          /* 比外框小 3px，正好贴合描边内侧 */
}

.avatar-fallback {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 34% 26%, rgba(124,140,255,.34), transparent 62%),
    radial-gradient(circle at 72% 78%, rgba(69,224,208,.22), transparent 60%),
    #101018;
  font-size: clamp(2.2rem, 5vw, 3.1rem);
  font-weight: 800;
  letter-spacing: .07em;
  color: rgba(244,244,246,.80);
  text-indent: .07em;
}

.avatar-img {
  display: none;              /* 默认隐藏；检测到照片后由 JS 切换 */
  object-fit: cover;
  object-position: center;
  background: #101018;
}

.avatar-frame.has-photo .avatar-img      { display: block; }
.avatar-frame.has-photo .avatar-fallback { display: none; }

/* 卡片背后的呼吸光晕（只动 opacity/transform，走合成层，开销低） */
.avatar-ring {
  position: absolute;
  z-index: 1;
  width: min(400px, 78vw);
  aspect-ratio: 1;
  border-radius: 38px;
  background: conic-gradient(from 0deg,
              rgba(124,140,255,.55) 0%,  transparent 28%,
              rgba(69,224,208,.40) 52%, transparent 76%,
              rgba(124,140,255,.55) 100%);
  filter: blur(30px);
  animation: breathe 9s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { opacity: .72; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.035); }
}

/* 四角取景框（卡片外沿的 L 形角标，对应"拍视频"的意象） */
.marks {
  position: absolute;
  inset: -16px;
  z-index: 3;
  pointer-events: none;
}

.marks i {
  position: absolute;
  width: 26px; height: 26px;
  border: 2px solid rgba(124,140,255,.72);
  animation: markPulse 4.2s ease-in-out infinite;
}
.marks i:nth-child(1) {
  top: 0; left: 0;
  border-right: 0; border-bottom: 0;
  border-radius: 13px 0 0 0;
}
.marks i:nth-child(2) {
  top: 0; right: 0;
  border-left: 0; border-bottom: 0;
  border-radius: 0 13px 0 0;
  animation-delay: .5s;
}
.marks i:nth-child(3) {
  bottom: 0; right: 0;
  border-left: 0; border-top: 0;
  border-radius: 0 0 13px 0;
  animation-delay: 1s;
}
.marks i:nth-child(4) {
  bottom: 0; left: 0;
  border-right: 0; border-top: 0;
  border-radius: 0 0 0 13px;
  animation-delay: 1.5s;
}

@keyframes markPulse {
  0%, 100% { opacity: .42; }
  50%      { opacity: 1; }
}

/* ===================== 区块标题 ===================== */

.sec-t {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--muted-2);
}
.sec-t::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* ===================== 视频卡片 ===================== */

.videos {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px 78px;
}

.vgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.vcard > a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--card-bg);
  transition: transform .4s cubic-bezier(.16,.84,.44,1), border-color .4s;
}
.vcard > a:hover {
  transform: translateY(-5px);
  border-color: rgba(255,255,255,.17);
}

.vthumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #101018;
}
.vthumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .84;
  transition: opacity .4s, scale .7s cubic-bezier(.16,.84,.44,1);
}
.vcard > a:hover .vthumb img { opacity: 1; scale: 1.045; }

.vplay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
}
.vplay::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 58px; height: 58px;
  margin: -29px 0 0 -29px;
  border-radius: 50%;
  background: rgba(7,7,11,.5);
  border: 1px solid rgba(255,255,255,.26);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
  transition: transform .35s cubic-bezier(.16,.84,.44,1), background-color .35s;
}
.vcard > a:hover .vplay::before {
  transform: scale(1.09);
  background: rgba(124,140,255,.62);
}
.vplay svg {
  position: relative;
  z-index: 1;
  margin-left: 3px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.5));
}

.vdur {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 3px 8px;
  border-radius: 7px;
  background: rgba(7,7,11,.74);
  -webkit-backdrop-filter: blur(4px);
          backdrop-filter: blur(4px);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .03em;
  color: rgba(255,255,255,.9);
}

.vmeta { display: block; padding: 16px 18px 18px; }

.vtitle {
  display: block;
  font-size: .98rem;
  font-weight: 650;
  line-height: 1.5;
}

.vsub {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted-2);
}

/* ===================== 链接卡片 ===================== */

.links {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px 132px;
}

.lgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lcard > a {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  background: var(--card-bg);
  transition: transform .35s cubic-bezier(.16,.84,.44,1), border-color .35s;
}
.lcard > a:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,.18);
}

/* 跟随光标的聚光（--mx/--my 由 main.js 写入） */
.lcard > a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .35s;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%),
              rgba(124,140,255,.16), transparent 68%);
}
.lcard > a:hover::after { opacity: 1; }

.licon {
  display: grid;
  place-items: center;
  flex: 0 0 40px;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255,255,255,.04);
}

.lmeta { flex: 1 1 auto; min-width: 0; }

.ltitle {
  display: block;
  font-size: .96rem;
  font-weight: 650;
}

.lsub {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted-2);
}

.larrow {
  flex: 0 0 auto;
  color: var(--muted-2);
  transition: transform .3s cubic-bezier(.16,.84,.44,1), color .3s;
}
.lcard > a:hover .larrow { transform: translateX(3px); color: var(--fg); }

/* ===================== 滚动提示 ===================== */

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted-2);
  transition: color .25s;
}
.scroll-hint:hover { color: var(--muted); }
.scroll-hint svg { animation: bob 2.2s ease-in-out infinite; }

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(4px); }
}

/* ===================== 页脚 ===================== */

.footer {
  border-top: 1px solid var(--line-2);
  background: linear-gradient(180deg, transparent, rgba(124,140,255,.045));
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 88px 28px 64px;
  text-align: center;
}

.footer-t {
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -.015em;
}

.footer-dot {
  background: linear-gradient(100deg, var(--a), var(--b));
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

.footer-d {
  margin-top: 16px;
  font-size: 15px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.footer-c {
  margin-top: 56px;
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--muted-2);
}

/* ===================== 入场动画 ===================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  animation: reveal .95s cubic-bezier(.16,.84,.44,1) forwards;
  animation-delay: var(--d, 0s);
}

@keyframes reveal {
  to { opacity: 1; transform: none; }
}

/* ===================== 响应式 ===================== */

@media (max-width: 1000px) {
  .hero-inner { gap: 44px; }
}

@media (max-width: 820px) {
  .hero { padding: 104px 20px 74px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 26px;
    text-align: center;
  }

  .hero-media { order: -1; padding: 12px; }
  .avatar-frame { width: min(196px, 50vw); border-radius: 22px; }
  .avatar-frame > * { border-radius: 19px; }
  .avatar-ring  { width: min(250px, 64vw); border-radius: 28px; }
  .marks { inset: -12px; }
  .marks i { width: 20px; height: 20px; }

  .title { justify-content: center; }
  .role  { justify-content: center; }
  .lede, .lede-en { margin-inline: auto; }
  .cta, .status { justify-content: center; }

  .videos { padding: 0 20px 64px; }
  .links  { padding: 0 20px 100px; }
  .vgrid  { gap: 16px; }

  .nav { padding: 18px max(20px, calc((100% - var(--maxw)) / 2)); }
  .nav-links { gap: 20px; }

  .scroll-hint { display: none; }
}

@media (max-width: 700px) {
  .vgrid, .lgrid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .nav-links { display: none; }
  .btn { width: 100%; }
  .cta { flex-direction: column; }
  .footer-inner { padding: 72px 22px 52px; }
  .vmeta { padding: 14px 16px 16px; }
}

/* ===================== 无障碍 / 降级 ===================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; animation: none; }
  .title-main .ch { opacity: 1; transform: none; animation: none; }
  .bg-aurora, .avatar-ring, .dot, .scroll-hint svg, .caret, .marks i { animation: none; }
  .marks i { opacity: .7; }

  * { transition-duration: .01ms !important; }
}

@media print {
  .bg, .nav, .scroll-hint, .progress, .cursor-glow, .marks, .avatar-ring { display: none; }
  body { background: #fff; color: #000; }
}