/* =========================================================
   苏其辉 · 多媒体设计师作品集
   Apple / DJI 风格 · 极简 · 留白 · 滚动叙事
   ========================================================= */

/* ---------- 主题变量 ---------- */
:root,
[data-theme="light"] {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --surface: #fbfbfd;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.12);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(255, 255, 255, 0.72);
  --card-bg: #ffffff;
  --glow: radial-gradient(circle at 50% 0%, rgba(0, 113, 227, 0.10), transparent 60%);
}
[data-theme="dark"] {
  --bg: #000000;
  --bg-soft: #0a0a0a;
  --surface: #161617;
  --text: #f5f5f7;
  --text-2: #a1a1a6;
  --line: #2a2a2c;
  --accent: #2997ff;
  --accent-soft: rgba(41, 151, 255, 0.16);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(10, 10, 10, 0.66);
  --card-bg: #161617;
  --glow: radial-gradient(circle at 50% 0%, rgba(41, 151, 255, 0.14), transparent 60%);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: var(--accent); color: #fff; }

/* 自定义滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-2); }

/* ---------- 布局工具 ---------- */
.container { width: min(1200px, 92vw); margin-inline: auto; }
.section { padding: clamp(64px, 10vh, 120px) 0; position: relative; scroll-margin-top: 60px; }
.section__eyebrow {
  font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 14px;
}
.section__title {
  font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 48px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 30px; border-radius: 980px; font-size: 1rem; font-weight: 500;
  transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), background 0.25s, box-shadow 0.25s;
  will-change: transform;
}
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px var(--accent-soft); }
.btn--primary:hover { transform: scale(1.04); box-shadow: 0 12px 32px var(--accent-soft); }
.btn--ghost { border: 1px solid var(--line); color: var(--text); }
.btn--ghost:hover { transform: scale(1.04); border-color: var(--accent); color: var(--accent); }

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s;
}
.nav.is-scrolled {
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  box-shadow: 0 1px 0 var(--line);
}
.nav__inner {
  width: min(1200px, 94vw); margin-inline: auto; height: 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.nav__logo {
  width: 30px; height: 30px; border-radius: 50%; overflow: hidden;
  display: block; flex-shrink: 0;
}
.nav__logo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nav__name { font-size: 1.05rem; letter-spacing: -0.01em; }
.nav__links { display: flex; gap: 4px; }
.nav__link {
  position: relative; padding: 8px 16px; border-radius: 980px; font-size: 0.95rem; color: var(--text-2);
  background: rgba(127,127,127,0.06);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(127,127,127,0.10);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.14);
  transition: color 0.45s cubic-bezier(0.34,1.56,0.64,1), background 0.45s cubic-bezier(0.34,1.56,0.64,1),
              border-color 0.45s cubic-bezier(0.34,1.56,0.64,1), transform 0.45s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.45s ease;
}
.nav__link:hover { color: var(--text); background: rgba(127,127,127,0.12); transform: translateY(-1px); }
.nav__link.active {
  color: #fff; background: var(--accent); border-color: transparent; transform: scale(1.05);
  box-shadow: 0 6px 18px -6px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,0.28);
}
[data-theme="dark"] .nav__link { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.10); box-shadow: inset 0 1px 0 rgba(255,255,255,0.06); }
[data-theme="dark"] .nav__link:hover { background: rgba(255,255,255,0.13); }
[data-theme="dark"] .nav__link.active { box-shadow: 0 6px 20px -6px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,0.22); }
.nav__actions { display: flex; align-items: center; gap: 8px; }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  color: var(--text); transition: background 0.2s, transform 0.3s;
}
.theme-toggle:hover { background: var(--accent-soft); }
.theme-toggle:active { transform: rotate(40deg); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
.nav__burger { display: none; width: 40px; height: 40px; flex-direction: column; gap: 5px; justify-content: center; align-items: center; }
.nav__burger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Hero 首屏
   ========================================================= */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; overflow: hidden;
  padding: 100px 20px 0;
}
.hero__bg {
  position: absolute; top: -20%; left: 0; right: 0; height: 140%; z-index: 0;
  background:
    radial-gradient(circle at 20% 20%, var(--accent-soft), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(128,90,213,0.10), transparent 42%),
    var(--glow);
  will-change: transform;
}
.hero__glow {
  position: absolute; width: 60vw; height: 60vw; max-width: 720px; max-height: 720px;
  top: 8%; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  filter: blur(40px); z-index: 0; pointer-events: none;
}
.hero__inner { position: relative; z-index: 2; width: min(1100px, 94vw); }
.hero__avatar {
  position: relative; /* 嵌入文字流 */
  width: 96px; height: 96px;
  border-radius: 50%; overflow: hidden;
  background: var(--bg);
  padding: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12), inset 0 0 0 1px var(--line);
  margin-bottom: 18px;
  transition: transform 0.5s cubic-bezier(0.34,1.56,0.64,1);
  will-change: transform;
  /* 入场动画 */
  opacity: 0; transform: scale(0.6);
}
.hero__avatar.is-visible { opacity: 1; transform: scale(1); transition: opacity 0.6s ease, transform 0.8s cubic-bezier(0.34,1.56,0.64,1); }
.hero__avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; display: block; }
.hero__avatar:hover { transform: scale(1.06) rotate(-3deg); }
[data-theme="dark"] .hero__avatar { box-shadow: 0 8px 24px rgba(0,0,0,0.6), inset 0 0 0 1px var(--line); }
@media (max-width: 768px) {
  .hero__avatar { width: 72px; height: 72px; margin-bottom: 14px; }
}
.hero__eyebrow { font-size: 0.85rem; letter-spacing: 0.3em; color: var(--text-2); margin-bottom: 20px; }
.hero__title { line-height: 0.95; margin-bottom: 22px; }
.hero__name {
  display: block; font-size: clamp(3.4rem, 13vw, 9rem); font-weight: 700;
  letter-spacing: -0.04em; background: linear-gradient(180deg, var(--text), var(--text-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__en {
  display: block; font-size: clamp(0.9rem, 3vw, 1.4rem); font-weight: 500;
  letter-spacing: 0.5em; color: var(--text-2); margin-top: 10px; padding-left: 0.5em;
}
.hero__role { font-size: clamp(1.2rem, 3.5vw, 1.8rem); font-weight: 600; margin-bottom: 10px; }
.hero__tagline { color: var(--text-2); font-size: clamp(0.95rem, 2.5vw, 1.1rem); margin-bottom: 36px; }
.hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero__product {
  margin: 56px auto 0; width: min(420px, 78vw); border-radius: 18px; overflow: hidden;
  box-shadow: var(--shadow); background: var(--card-bg);
  transition: transform 0.6s cubic-bezier(0.16,1,0.3,1);
}
.hero__product img { width: 100%; height: auto; display: block; }
.hero__scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--text-2); font-size: 0.78rem; letter-spacing: 0.1em;
}
.hero__scroll-line { width: 1px; height: 46px; background: linear-gradient(var(--text-2), transparent); position: relative; overflow: hidden; }
.hero__scroll-line::after {
  content: ""; position: absolute; top: -50%; left: 0; width: 100%; height: 50%;
  background: var(--accent); animation: scrollDot 2s cubic-bezier(0.7,0,0.3,1) infinite;
}
@keyframes scrollDot { 0% { top: -50%; } 100% { top: 100%; } }

/* ---------- 3D 倾斜卡 ---------- */
.tilt-card { transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transition: transform 0.4s cubic-bezier(0.16,1,0.3,1); transform-style: preserve-3d; }

/* =========================================================
   关于
   ========================================================= */
.about__grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.about__lead { font-size: clamp(1.1rem, 2.5vw, 1.4rem); font-weight: 600; margin-bottom: 18px; line-height: 1.5; }
.about__text p { color: var(--text-2); margin-bottom: 16px; }
.about__text strong { color: var(--text); font-weight: 600; }
.about__stats { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 32px; }
.about__stats li { display: flex; flex-direction: column; }
.about__stats .num { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; color: var(--accent); line-height: 1; }
.about__stats em { font-style: normal; font-size: 0.85rem; color: var(--text-2); margin-top: 6px; }
.about__card { position: relative; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow); background: var(--card-bg); aspect-ratio: 3/4; }
.about__card img { width: 100%; height: 100%; object-fit: cover; }
.about__card-badge {
  position: absolute; left: 16px; bottom: 16px; background: var(--nav-bg); backdrop-filter: blur(12px);
  padding: 8px 16px; border-radius: 980px; font-size: 0.85rem; font-weight: 500; box-shadow: var(--shadow-sm);
}

/* 装备 — 散开展示 */
.gear { margin-top: clamp(48px, 8vw, 90px); }
.gear__title { font-size: 1.3rem; font-weight: 600; margin-bottom: 6px; }
.gear__hint { font-size: 0.78rem; color: var(--text-2); margin-bottom: 24px; letter-spacing: 0.04em; }
.gear__scatter {
  display: flex; justify-content: center; align-items: flex-end;
  gap: 0; padding: 20px 0 40px; min-height: 220px;
  perspective: 800px;
}
.gear__item {
  flex-shrink: 0; width: 120px; height: 120px; border-radius: 16px;
  overflow: hidden; cursor: pointer; padding: 0; position: relative;
  background: transparent; border: none;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,0.18));
  transform: rotate(var(--angle, 0deg)) translateY(var(--lift, 0px)) scale(var(--scale, 0.9));
  transition: transform 0.5s cubic-bezier(0.34,1.56,0.64,1), filter 0.4s, z-index 0s;
  z-index: 1;
  margin-left: -20px;
}
.gear__item:first-child { margin-left: 0; }
.gear__item:hover {
  transform: rotate(0deg) translateY(-16px) scale(1.15);
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.25));
  z-index: 10;
}
.gear__item img { width: 100%; height: 100%; object-fit: cover; display: block; border-radius: 16px; }
.gear__item img.gear__stamp {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: contain; padding: 10px;
  pointer-events: none; user-select: none;
  opacity: 0.9; transition: opacity 0.3s;
}
.gear__item--sold { opacity: 0.65; filter: drop-shadow(0 6px 16px rgba(0,0,0,0.12)) grayscale(15%); }
.gear__item--sold:hover { opacity: 1; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.25)) grayscale(0%); }
.gear__item--sold:hover img.gear__stamp { opacity: 0.3; }
.gear__item-name {
  position: absolute; bottom: -28px; left: 50%; transform: translateX(-50%);
  font-size: 0.72rem; color: var(--text-2); white-space: nowrap;
  opacity: 0; transition: opacity 0.3s;
  pointer-events: none;
}
.gear__item:hover .gear__item-name { opacity: 1; }
[data-theme="dark"] .gear__item { filter: drop-shadow(0 8px 20px rgba(0,0,0,0.4)); }
[data-theme="dark"] .gear__item:hover { filter: drop-shadow(0 20px 40px rgba(0,0,0,0.6)); }

/* =========================================================
   能力叙事（钉住滚动）
   ========================================================= */
.caps { position: relative; background: var(--bg-soft); }
.caps__track { position: relative; height: 420vh; }
.caps__sticky {
  position: sticky; top: 0; height: 100vh; height: 100svh; display: flex; flex-direction: column;
  justify-content: center; overflow: hidden; padding: 90px 0 40px;
}
.caps__head { text-align: center; margin-bottom: 30px; }
.caps__head .section__title { margin-bottom: 0; }
.caps__stage {
  width: min(1100px, 92vw); margin-inline: auto; position: relative;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.caps__visual {
  position: relative; aspect-ratio: 4/3; border-radius: 22px; overflow: hidden;
  background: var(--card-bg); box-shadow: var(--shadow);
  transform: rotateY(var(--cap-rot, 0deg)); transition: transform 0.2s linear; transform-style: preserve-3d;
}
.caps__media { position: absolute; inset: 0; opacity: 0; transform: scale(1.04); transition: opacity 0.6s ease, transform 0.6s ease; }
.caps__media.is-active { opacity: 1; transform: scale(1); }
.caps__media img { width: 100%; height: 100%; object-fit: cover; }
.caps__ring {
  position: absolute; inset: -14px; border-radius: 26px; pointer-events: none;
  background: conic-gradient(from 0deg, transparent, var(--accent-soft), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; padding: 2px; opacity: 0.8;
}
.caps__captions { position: relative; min-height: 200px; }
.caps__cap {
  position: absolute; inset: 0; opacity: 0; transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease; display: flex; flex-direction: column; justify-content: center;
}
.caps__cap.is-active { opacity: 1; transform: translateY(0); }
.caps__num { font-size: 0.85rem; letter-spacing: 0.2em; color: var(--accent); font-weight: 600; }
.caps__cap h3 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; margin: 8px 0 14px; }
.caps__cap p { color: var(--text-2); font-size: 1.05rem; max-width: 42ch; }
.caps__progress { position: absolute; bottom: 6%; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; }
.caps__progress .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); transition: background 0.3s, transform 0.3s; }
.caps__progress .dot.is-active { background: var(--accent); transform: scale(1.4); }

/* =========================================================
   技能
   ========================================================= */
.skills__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.skill {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 22px 12px 18px; border-radius: 16px;
  background: var(--card-bg); border: 1px solid var(--line);
  transition: transform 0.3s, border-color 0.3s;
}
.skill:hover { transform: translateY(-3px); border-color: var(--accent); }
.skill__icon { width: 40px; height: 40px; object-fit: contain; display: block; }
.skill__name { font-weight: 500; font-size: 0.9rem; color: var(--text-2); text-align: center; }

/* =========================================================
   作品集
   ========================================================= */
.tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.tab {
  padding: 10px 22px; border-radius: 980px; font-size: 0.95rem; color: var(--text-2);
  background: rgba(127,127,127,0.05);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(127,127,127,0.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.12);
  transition: color 0.45s cubic-bezier(0.34,1.56,0.64,1), background 0.45s cubic-bezier(0.34,1.56,0.64,1),
              border-color 0.45s cubic-bezier(0.34,1.56,0.64,1), transform 0.45s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.45s ease;
}
.tab:hover { color: var(--text); background: rgba(127,127,127,0.11); border-color: var(--text-2); transform: translateY(-1px); }
.tab.is-active {
  color: #fff; background: var(--accent); border-color: transparent; transform: scale(1.04);
  box-shadow: 0 8px 22px -8px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,0.28);
}
[data-theme="dark"] .tab { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.12); }
[data-theme="dark"] .tab:hover { background: rgba(255,255,255,0.13); }
[data-theme="dark"] .tab.is-active { box-shadow: 0 8px 24px -8px var(--accent-soft), inset 0 1px 0 rgba(255,255,255,0.22); }
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 0; }
.gallery + .gallery { margin-top: 20px; }
.gallery[hidden] { display: none !important; }
.portfolio__disclaimer { text-align: center; color: var(--text-2); font-size: 0.78rem; margin-top: 32px; line-height: 1.6; }
.card { background: var(--card-bg); border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--line); transition: transform 0.4s cubic-bezier(0.16,1,0.3,1), box-shadow 0.4s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card__img { display: block; width: 100%; aspect-ratio: 4/3; overflow: hidden; position: relative; background: var(--bg-soft); }
.card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.card:hover .card__img img { transform: scale(1.06); }
.card__cap { padding: 14px 18px; font-size: 0.95rem; font-weight: 500; }
.card--video .card__img { aspect-ratio: 16/9; }
.card__poster { width: 100%; height: 100%; object-fit: cover; }
.card__play {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 0; height: 0; border-style: solid; border-width: 13px 0 13px 22px;
  border-color: transparent transparent transparent rgba(255,255,255,0.92);
  filter: drop-shadow(0 2px 10px rgba(0,0,0,0.55));
  font-size: 0; line-height: 0; color: transparent; pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1), border-color 0.3s, filter 0.3s;
}
.card:hover .card__play { transform: translate(-50%, -50%) scale(1.2); border-left-color: #fff; filter: drop-shadow(0 3px 14px rgba(0,0,0,0.7)); }
.card__img.no-poster { background: linear-gradient(135deg, var(--accent-soft), var(--bg-soft)); }
/* 视频分类标签 */
.card__tag {
  position: absolute; right: 8px; bottom: 8px; padding: 2px 10px; border-radius: 10px;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.5px;
  background: rgba(0,0,0,0.55); color: #fff; backdrop-filter: blur(6px);
  border: 0.5px solid rgba(255,255,255,0.15); pointer-events: none; z-index: 2;
}

/* =========================================================
   抖音
   ========================================================= */
.douyin__inner { display: grid; grid-template-columns: 1fr 0.8fr; gap: clamp(32px, 6vw, 70px); align-items: center; }
.douyin__id { font-size: 1.2rem; font-weight: 600; color: var(--accent); margin: 8px 0 16px; }
.douyin__desc { color: var(--text-2); margin-bottom: 28px; max-width: 46ch; }
.douyin__phone { border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); background: var(--card-bg); border: 1px solid var(--line); max-width: 360px; margin-inline: auto; }
.douyin__phone img { width: 100%; display: block; }

/* =========================================================
   时间线
   ========================================================= */
.tl { position: relative; max-width: 820px; margin-inline: auto; padding-left: 28px; }
.tl::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl__item { position: relative; padding-bottom: 36px; }
.tl__item:last-child { padding-bottom: 0; }
.tl__dot { position: absolute; left: -28px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px var(--accent-soft); }
.tl__card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 22px 26px; transition: transform 0.3s, border-color 0.3s; }
.tl__card:hover { transform: translateX(6px); border-color: var(--accent); }
.tl__badge { position: absolute; top: 14px; right: 16px; font-size: 0.78rem; font-weight: 600; color: #fff; background: var(--accent); padding: 3px 12px; border-radius: 980px; letter-spacing: 0.04em; }
.tl__date { font-size: 0.82rem; color: var(--accent); font-weight: 600; letter-spacing: 0.04em; }
.tl__title { font-size: 1.25rem; font-weight: 700; margin: 6px 0 4px; letter-spacing: -0.01em; }
.tl__title em { font-style: normal; font-size: 0.8rem; font-weight: 500; color: var(--text-2); }
.tl__sub { color: var(--text); font-weight: 500; }
.tl__meta { color: var(--text-2); font-size: 0.92rem; margin-top: 6px; }

/* =========================================================
   证书
   ========================================================= */
.certs__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 680px; margin-inline: auto; }
.cert {
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 32px 26px;
  text-align: center; transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.cert:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow-sm); }
.cert__icon { font-size: 2.4rem; display: block; margin-bottom: 14px; }
.cert h3 { font-size: 1.05rem; font-weight: 600; }

/* =========================================================
   联系
   ========================================================= */
.contact { padding-bottom: 60px; }
.contact__inner { text-align: center; }
.contact__title { font-size: clamp(2rem, 6vw, 3.6rem); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 40px; max-width: 16ch; margin-inline: auto; }
.contact__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 640px; margin-inline: auto; }
.contact__item {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 30px 20px;
  background: var(--card-bg); border: 1px solid var(--line); border-radius: 18px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.contact__item:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow-sm); }
.contact__icon { font-size: 1.8rem; }
.contact__label { font-size: 0.82rem; color: var(--text-2); letter-spacing: 0.04em; }
.contact__val { font-size: 1.05rem; font-weight: 600; }
.contact__loc { margin-top: 30px; color: var(--text-2); font-size: 1rem; }

/* =========================================================
   页脚
   ========================================================= */
.footer { padding: 28px 0 24px; border-top: 1px solid var(--line); }
.footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--text-2); font-size: 0.9rem; }

/* =========================================================
   Lightbox
   ========================================================= */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.92); backdrop-filter: blur(8px); padding: 4vh 4vw;
}
.lightbox.is-open { display: flex; animation: lbFade 0.3s ease; }
@keyframes lbFade { from { opacity: 0; } to { opacity: 1; } }
.lightbox__stage { max-width: 92vw; max-height: 82vh; display: flex; align-items: center; justify-content: center; }
.lightbox__stage img, .lightbox__stage video { max-width: 92vw; max-height: 82vh; border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); background: #000; }
.lightbox__close { position: absolute; top: 22px; right: 26px; width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.12); color: #fff; font-size: 1.2rem; display: grid; place-items: center; transition: background 0.2s; }
.lightbox__close:hover { background: rgba(255,255,255,0.25); }
.lightbox__nav { position: absolute; top: 50%; transform: translateY(-50%); width: 52px; height: 52px; border-radius: 50%; background: rgba(255,255,255,0.12); color: #fff; font-size: 1.8rem; display: grid; place-items: center; transition: background 0.2s; }
.lightbox__nav:hover { background: rgba(255,255,255,0.25); }
.lightbox__nav--prev { left: 2vw; }
.lightbox__nav--next { right: 2vw; }
.lightbox__caption { position: absolute; bottom: 22px; left: 0; right: 0; text-align: center; color: rgba(255,255,255,0.85); font-size: 0.95rem; }

/* =========================================================
   滚动揭示动画
   ========================================================= */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity 0.8s cubic-bezier(0.16,1,0.3,1), transform 0.8s cubic-bezier(0.16,1,0.3,1); transition-delay: var(--rd, 0ms); will-change: opacity, transform; }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .about__grid { grid-template-columns: 1fr; }
  .about__card { max-width: 380px; margin-inline: auto; }
  .douyin__inner { grid-template-columns: 1fr; }
  .caps__stage { grid-template-columns: 1fr; gap: 28px; }
  .caps__captions { min-height: 160px; text-align: center; }
  .caps__cap { align-items: center; }
  .caps__cap p { margin-inline: auto; }
}
@media (max-width: 768px) {
  body { font-size: 16px; }
  .nav__links {
    position: fixed; inset: 56px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--nav-bg); backdrop-filter: blur(20px); padding: 10px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15); transform: translateY(-120%); transition: transform 0.35s ease;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__link { padding: 14px 24px; border-radius: 0; }
  .nav__burger { display: flex; }
  .about__stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .gallery { gap: 16px; }
  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .caps__track { height: 360vh; }
}
@media (max-width: 480px) {
  .gallery { gap: 12px; }
  .skills__grid { grid-template-columns: repeat(2, 1fr); }
  .hero__cta { flex-direction: column; width: 100%; max-width: 280px; margin-inline: auto; }
  .hero__cta .btn { width: 100%; }
}

/* 无障碍：减弱动效 */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .tilt-card { transform: none !important; }
}

/* =========================================================
   v2 升级样式
   ========================================================= */

/* ---------- 深色模式圆形扩散切换 ---------- */
.theme-ripple {
  position: fixed; inset: 0; z-index: 10001;
  pointer-events: none;
  background: var(--accent); /* accent 色，深/浅主题下都可见 */
  opacity: 0.18;             /* 半透明，不抢戏 */
  clip-path: circle(0px at 50% 50%);
  transition: clip-path 0s;
}
/* 切到深色时的扩散动画 */
.theme-ripple.is-expanding {
  clip-path: circle(var(--ripple-radius) at var(--ripple-x) var(--ripple-y));
  transition: clip-path 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
/* 切回浅色时的收缩动画 */
.theme-ripple.is-collapsing {
  clip-path: circle(var(--ripple-radius) at var(--ripple-x) var(--ripple-y));
  transition: clip-path 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
/* ---------- 滚动进度条 ---------- */
.scroll-progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; background: var(--accent); opacity: 0.8; z-index: 10000; will-change: width; pointer-events: none; }

/* ---------- 光标跟随光晕 ---------- */
.cursor-glow {
  position: fixed; width: 40px; height: 40px;
  border-radius: 50%; pointer-events: none; z-index: 9999;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: 0.40; mix-blend-mode: normal;
  transform: translate(-50%, -50%); will-change: transform, width, height, left, top;
  transition: width 0.3s ease-out, height 0.3s ease-out, opacity 0.3s ease-out;
}
[data-theme="dark"] .cursor-glow { opacity: 0.20; mix-blend-mode: screen; }
.cursor-glow.is-hovering { width: 80px; height: 80px; opacity: 0.55; }
[data-theme="dark"] .cursor-glow.is-hovering { opacity: 0.35; }
@media (prefers-reduced-motion: reduce) { .cursor-glow { display: none; } }
/* 触摸设备光标由JS touchstart 接管，不隐藏 */

/* ---------- Noise 纹理叠加 ---------- */
.section::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  opacity: 0.04; mix-blend-mode: multiply; z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}
[data-theme="dark"] .section::after { mix-blend-mode: overlay; opacity: 0.03; }

/* ---------- 技能雷达图 ---------- */
.skills__radar-wrap { display: flex; justify-content: center; margin: 2rem auto; }
.skills__radar { max-width: 280px; width: 100%; height: auto; }
.skills__radar .radar-grid { stroke: var(--line); stroke-width: 0.5; fill: none; }
.skills__radar .radar-axis { stroke: var(--line); stroke-width: 0.3; }
.skills__radar .radar-poly { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; opacity: 0.6; transition: opacity 0.2s; }
.skills__radar .radar-poly.is-hovered { opacity: 0.9; }
.skills__radar .radar-dot { fill: var(--accent); cursor: pointer; transition: r 0.2s; }
.skills__radar .radar-dot.is-active { r: 5; }
.skills__radar .radar-label { fill: var(--text-2); font-size: 11px; font-family: var(--sans); }

.skills__icons { display: flex; justify-content: center; gap: 6px; margin-top: 1.2rem; flex-wrap: wrap; }
.skill-icon {
  display: flex; align-items: center; gap: 6px; padding: 8px 12px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 980px;
  cursor: pointer; opacity: 0.5; transition: opacity 0.2s, transform 0.2s, border-color 0.2s;
}
.skill-icon:hover, .skill-icon.is-active { opacity: 1; transform: scale(1.05); border-color: var(--accent); }
.skill-icon img { width: 20px; height: 20px; object-fit: contain; }
.skill-icon__label { font-size: 0.8rem; color: var(--text-2); font-weight: 500; }

/* ---------- AI 工具行 ---------- */
.skills__ai { display: flex; justify-content: center; align-items: center; gap: 16px; margin-top: 2rem; }
.skills__ai-label { font-size: 0.82rem; color: var(--text-2); letter-spacing: 0.08em; font-weight: 600; }
.skills__ai-icons { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.skill-icon--ai { opacity: 0.7; transition: opacity 0.25s, transform 0.25s cubic-bezier(0.34,1.56,0.64,1), border-color 0.25s; }
.skill-icon--ai:hover { opacity: 1; transform: scale(1.08); }
.skill-icon--ai img { transition: transform 0.4s ease; width: 22px; height: 22px; }
.skill-icon--ai:hover img { transform: rotate(-6deg); }
/* 4个AI工具品牌色 (SVG用fill=currentColor继承color) */
.ai-codex img { color: #10a37f; }      /* OpenAI Codex — 绿色 */
.ai-workbuddy img { color: var(--accent); }  /* WorkBuddy 项目accent色 */
.ai-qwen img { color: #615ced; }      /* 通义千问 — 官方紫 */
.ai-jimeng img { color: #ff5b3e; }     /* 即梦 — 字节暖橙红 */

/* ---------- 作品集交互增强 ---------- */
.card--interactive { perspective: 600px; }
.card__overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.35s ease;
  pointer-events: none; z-index: 3; border-radius: inherit;
}
.card--interactive:hover .card__overlay { opacity: 1; }
.card__overlay-text {
  color: #fff; font-size: 0.95rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  transform: translateY(8px); transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}
.card--interactive:hover .card__overlay-text { transform: translateY(0); }
/* 图片区hover 3D tilt */
.card--interactive .card__img {
  transform-style: preserve-3d; transition: transform 0.4s cubic-bezier(0.16,1,0.3,1);
}
.card--interactive:hover .card__img { transform: perspective(600px) rotateX(var(--card-rx, 2deg)) rotateY(var(--card-ry, -2deg)) scale(1.02); }

/* ---------- 回到顶部按钮 ---------- */
.back-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 9000;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 10px 12px 6px; border-radius: 50%; cursor: pointer;
  background: var(--card-bg); border: 1.5px solid var(--line);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  color: var(--accent);
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.35s, transform 0.35s cubic-bezier(0.34,1.56,0.64,1), border-color 0.25s, box-shadow 0.25s;
  pointer-events: none;
}
.back-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { border-color: var(--accent); box-shadow: 0 10px 28px rgba(0,0,0,0.18); transform: translateY(-3px); }
.back-top__icon { display: block; }
.back-top__text { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.06em; color: var(--accent); }
[data-theme="dark"] .back-top { background: var(--surface); box-shadow: 0 6px 20px rgba(0,0,0,0.5); }

@media (max-width: 768px) {
  .skills__radar-wrap { margin: 1rem auto; }
  .skills__radar { max-width: 220px; }
  .skill-icon { padding: 6px 10px; }
  .skill-icon img { width: 16px; height: 16px; }
  .skill-icon__label { font-size: 0.72rem; }
}

/* ---------- 可展开时间线 ---------- */
.tl__toggle {
  position: absolute; top: 14px; right: 14px;
  border: none; background: none; cursor: pointer; padding: 4px;
  color: var(--text-2); transition: color 0.2s;
}
.tl__toggle:hover { color: var(--accent); }
.tl__arrow { transition: transform 0.3s ease-out; }
.tl__item.is-open .tl__arrow { transform: rotate(180deg); }
.tl__detail {
  max-height: 0; overflow: hidden; opacity: 0; margin-top: 0;
  border-left: 2px solid var(--accent); padding-left: 0.75rem;
  background: var(--bg-soft); border-radius: 8px;
  transition: max-height 0.3s ease-out, opacity 0.3s ease-out, margin-top 0.3s ease-out;
}
.tl__detail p { color: var(--text-2); font-size: 0.92rem; margin-bottom: 6px; }
.tl__detail p:last-child { margin-bottom: 0; }
.tl__item.is-open .tl__detail { max-height: 200px; opacity: 1; margin-top: 0.5rem; padding-top: 0.5rem; padding-bottom: 0.5rem; }

/* =========================================================
   v2 移动端响应式修复
   ========================================================= */

/* 平板及以下：装备散开区缩小 */
@media (max-width: 1024px) {
  .gear__scatter { gap: 0; flex-wrap: nowrap; overflow-x: auto; padding: 20px 12px 40px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .gear__scatter::-webkit-scrollbar { display: none; }
  .gear__item { width: 100px; height: 100px; margin-left: -16px; flex-shrink: 0; }
  .gear__item:first-child { margin-left: 0; }
}

/* 手机端：全面修复 */
@media (max-width: 768px) {
  /* 装备区：改为2行4列grid，不再横向滚动 */
  .gear__scatter {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
    justify-content: center; align-items: center;
    overflow: visible; padding: 12px 8px 24px; min-height: auto;
    perspective: none;
  }
  .gear__item {
    width: 100%; height: auto; aspect-ratio: 1; margin-left: 0;
    transform: rotate(var(--angle, 0deg)) translateY(var(--lift, 0px)) scale(var(--scale, 0.9));
  }
  .gear__item:first-child { margin-left: 0; }
  /* 手机端去掉散开角度，整齐排列 */
  .gear__item { --angle: 0deg; --lift: 0px; --scale: 1; }

  /* 证书和联系：手机端保持2×2，缩小padding */
  .cert { padding: 18px 12px; }
  .cert__icon { font-size: 1.6rem; margin-bottom: 8px; }
  .cert h3 { font-size: 0.85rem; }
  .contact__item { padding: 16px 10px; gap: 4px; }
  .contact__icon { font-size: 1.3rem; }
  .contact__label { font-size: 0.7rem; }
  .contact__val { font-size: 0.82rem; word-break: break-all; }

  /* 时间线：toggle 移到右下角，避免与 badge 重叠 */
  .tl__badge { position: static; display: inline-block; margin-bottom: 8px; }
  .tl__toggle { position: absolute; bottom: 12px; right: 12px; top: auto; }
  .tl__card { padding: 20px 20px 44px; }

  /* 回到顶部按钮：缩小，防遮挡 */
  .back-top { bottom: 18px; right: 18px; padding: 8px 10px 4px; }
  .back-top__icon svg { width: 20px; height: 20px; }
  .back-top__text { font-size: 0.55rem; }

  /* 光标光晕：触摸端由JS接管（touchstart/touchmove），CSS不隐藏 */

  /* 能力叙事 sticky：降低高度，减少滚动疲劳 */
  .caps__track { height: 300vh; }
  .caps__sticky { padding: 70px 0 30px; }
  .caps__stage { gap: 20px; }
  .caps__visual { aspect-ratio: 16/10; }

  /* 雷达图：适配窄屏 */
  .skills__radar { max-width: 200px; }
  .skills__radar .radar-label { font-size: 9px; }

  /* AI 工具行：换行居中 */
  .skills__ai { flex-direction: column; gap: 10px; }
  .skills__ai-icons { gap: 6px; }

  /* 作品集 overlay：触摸端常显半透明提示 */
  .card--interactive .card__overlay { opacity: 0.25; }
  .card__overlay-text { font-size: 0.8rem; }

  /* 涟漪层 z-index 不遮挡 fixed 元素 */
  .theme-ripple { z-index: 9998; }

  /* 导航：确保汉堡菜单在顶层 */
  .nav__links.is-open { z-index: 10002; }
}

/* 超窄屏（≤480px）：装备区更紧凑 */
@media (max-width: 480px) {
  .gear__item { width: 72px; height: 72px; margin-left: -12px; }
  .skills__radar { max-width: 180px; }
  .skills__radar .radar-label { font-size: 8px; }
  .skill-icon { padding: 5px 8px; }
  .skill-icon img { width: 15px; height: 15px; }
  .skill-icon__label { font-size: 0.68rem; }
  .back-top { bottom: 14px; right: 14px; }
}

/* 触摸设备：禁用 3D tilt 和 hover-only 交互 */
@media (hover: none) {
  .card--interactive:hover .card__img { transform: none; }
  .card--interactive:hover .card__overlay { opacity: 0.25; }
  .gear__item:hover { transform: rotate(var(--angle, 0deg)) translateY(var(--lift, 0px)) scale(var(--scale, 0.9)); }
}