/* ============================================================
   🐾东萝教🐾 — 介绍页设计系统 v2
   复刻 solicibrown.com 交互语言：
   WebGL blob 着色器首屏 / mix-blend-mode 反差文字 /
   桌面端水平滚动章节 / 编号列表联动 / 分字入场 / 固定页脚
   配色：浅蓝为主，浅粉 + 白为辅
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --bg: #fbfdff;
  --bg-soft: #eaf4ff;
  --surface: #ffffff;
  --blue: #9ad4f7;
  --blue-soft: #d9ecfb;
  --blue-deep: #1f6fb2;
  --blue-ink: #0d2b45;
  --pink: #ffdcea;
  --pink-soft: #ffeef6;
  --pink-deep: #e0569a;
  --ink: #24313d;
  --muted: #5d7285;
  --line: rgba(13, 43, 69, 0.12);
  --shadow: 0 24px 60px -24px rgba(31, 111, 178, 0.28);
  --nav-bg: rgba(251, 253, 255, 0.85);
  --btn-text: #ffffff;
  --btn-grad-1: #3a9bd8;
  --btn-grad-2: #1f6fb2;
  --vw: 100vw;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html.dark {
  --bg: #0a1a2b;
  --bg-soft: #0f2438;
  --surface: #10263c;
  --blue: #7ec8f2;
  --blue-soft: #16334e;
  --blue-deep: #8fd0f5;
  --blue-ink: #eaf6ff;
  --pink: #ffd9ea;
  --pink-soft: rgba(255, 158, 199, 0.14);
  --pink-deep: #ff9ec7;
  --ink: #d9e9f6;
  --muted: #8fa9bf;
  --line: rgba(234, 246, 255, 0.14);
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(10, 26, 43, 0.82);
  --btn-text: #0a1a2b;
  --btn-grad-1: #a5dff8;
  --btn-grad-2: #7ec8f2;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-soft);
  color: var(--ink);
  font-family: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.5s ease, color 0.5s ease;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font: inherit; color: inherit; }

html.nav-lock { overflow: hidden; }

::selection { background: var(--pink); color: var(--blue-ink); }

:focus-visible {
  outline: 2px solid var(--blue-deep);
  outline-offset: 3px;
  border-radius: 6px;
}

.serif { font-family: "Instrument Serif", "Noto Serif SC", serif; font-style: italic; font-weight: 400; }

/* ---------- 分字入场 ---------- */
.ch { display: inline-block; overflow: hidden; padding-bottom: 0.14em; margin-bottom: -0.14em; vertical-align: top; }
.ch > i { display: inline-block; font-style: inherit; transform: translateY(112%); transition: transform 1s var(--ease-out); }
body.revealed .hero__title .ch > i { transform: translateY(0); }
.panel.in .split .ch > i { transform: translateY(0); }

/* ---------- 视差 ---------- */
.plx { transform: translateY(calc(var(--p, 0) * var(--speed, 0) * 220px)); will-change: transform; }

/* ============================================================
   预加载
   ============================================================ */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: grid;
  place-items: center;
  transition: transform 0.9s cubic-bezier(0.76, 0, 0.24, 1);
}
#preloader.done { transform: translateY(-101%); }

.pre { display: flex; flex-direction: column; align-items: center; gap: 1.2rem; }
.pre__avatar {
  width: 92px; height: 92px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--pink);
  box-shadow: var(--shadow);
  animation: pulse 2.2s ease-in-out infinite;
}
.pre__avatar img { width: 100%; height: 100%; object-fit: cover; }
.pre__name { font-weight: 900; font-size: 0.95rem; letter-spacing: 0.5em; text-indent: 0.5em; color: var(--blue-ink); }
.pre__count { font-size: clamp(3.4rem, 9vw, 5.6rem); font-weight: 700; line-height: 1; color: var(--blue-deep); font-variant-numeric: tabular-nums; }
.pre__count i { font-style: normal; font-size: 0.32em; margin-left: 0.1em; }
.pre__bar { width: min(240px, 60vw); height: 3px; background: var(--blue-soft); border-radius: 99px; overflow: hidden; }
.pre__bar span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--blue), var(--pink-deep)); border-radius: 99px; }
.pre__paws { display: flex; gap: 1.1rem; margin-top: 0.2rem; }
.pre__paw { font-size: 1.05rem; opacity: 0; animation: pawIn 0.5s var(--ease-out) forwards; }
.pre__paw:nth-child(1) { animation-delay: 0.25s; }
.pre__paw:nth-child(2) { animation-delay: 0.5s; }
.pre__paw:nth-child(3) { animation-delay: 0.75s; }
.pre__paw:nth-child(4) { animation-delay: 1s; }

@keyframes pawIn { from { opacity: 0; transform: translateY(8px) scale(0.5); } to { opacity: 0.85; transform: none; } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line);
}

.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--blue-ink); }
.brand__avatar { width: 42px; height: 42px; border-radius: 50%; overflow: hidden; border: 2px solid var(--pink); flex-shrink: 0; }
.brand__avatar img { width: 100%; height: 100%; object-fit: cover; }
.brand__name { font-weight: 900; font-size: 1.02rem; letter-spacing: 0.04em; white-space: nowrap; }

.nav__links { display: flex; align-items: center; gap: 0.35rem; }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 1rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--blue-ink);
  text-decoration: none;
  border-radius: 999px;
  transition: color 0.3s;
}
.nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--blue-soft);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.3s, transform 0.35s var(--ease-out);
  z-index: -1;
}
.nav__link:hover::before { opacity: 1; transform: scale(1); }
.nav__caret { font-size: 0.7em; transition: rotate 0.35s var(--ease-out); }
.nav__drop.open .nav__caret { rotate: 180deg; }

.nav__drop { position: relative; }
.drop {
  position: absolute;
  top: calc(100% + 0.7rem);
  left: 50%;
  translate: -50% 0;
  width: 15.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 0.7rem;
  opacity: 0;
  visibility: hidden;
  scale: 0.92;
  transform-origin: top center;
  transition: opacity 0.3s, scale 0.35s var(--ease-out), visibility 0.3s;
}
.nav__drop.open .drop { opacity: 1; visibility: visible; scale: 1; }
.drop__head { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); padding: 0.5rem 0.8rem 0.6rem; }
.drop__count { font-family: "Instrument Serif", serif; font-style: italic; font-size: 1.05rem; letter-spacing: 0; color: var(--pink-deep); }
.drop__item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  width: 100%;
  padding: 0.62rem 0.8rem;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--blue-ink);
  text-align: left;
  transition: background 0.25s, translate 0.35s var(--ease-out);
}
.drop__item:hover { background: var(--blue-soft); translate: 0.3rem 0; }
.drop__num { font-family: "Instrument Serif", serif; font-style: italic; font-weight: 400; color: var(--pink-deep); }

.nav__right { display: flex; align-items: center; gap: 0.7rem; }
.icon-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--blue-ink);
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: rotate 0.4s var(--ease-out), border-color 0.3s, color 0.3s;
}
.icon-btn:hover { border-color: var(--pink-deep); color: var(--pink-deep); rotate: -14deg; }

.nav__cta {
  position: relative;
  z-index: 0;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.62rem 1.25rem;
  border-radius: 999px;
  background-image: linear-gradient(120deg, var(--btn-grad-1), var(--btn-grad-2), var(--btn-grad-1));
  background-size: 220% 100%;
  background-position: 0% 0%;
  color: var(--btn-text);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 10px 24px -10px rgba(31, 111, 178, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s, background-position 0.7s var(--ease-out);
}
.nav__cta::before {
  content: "";
  position: absolute;
  top: 0; left: -90%;
  width: 55%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  z-index: -1;
  pointer-events: none;
  transition: left 0.65s var(--ease-out);
}
.nav__cta:hover::before { left: 140%; }
.nav__cta:hover {
  background-position: 100% 0%;
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -10px rgba(31, 111, 178, 0.6), 0 0 0 4px rgba(154, 212, 247, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  place-items: center;
  align-content: center;
  gap: 5px;
}
.burger span { display: block; width: 16px; height: 2px; background: var(--blue-ink); border-radius: 2px; transition: transform 0.35s var(--ease-out), opacity 0.3s; }
.burger.open span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.burger.open span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* 移动端菜单 */
.mmenu {
  position: fixed;
  inset: 0;
  z-index: 850;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.1rem;
  padding: 2rem clamp(1.5rem, 7vw, 3rem);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s;
}
.mmenu.open { opacity: 1; visibility: visible; }
.mmenu__item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  font-size: clamp(1.9rem, 8vw, 2.6rem);
  font-weight: 900;
  color: var(--blue-ink);
  text-decoration: none;
  opacity: 0;
  translate: 0 18px;
  transition: opacity 0.5s ease, translate 0.6s var(--ease-out), color 0.3s;
}
.mmenu.open .mmenu__item { opacity: 1; translate: 0 0; }
.mmenu.open .mmenu__item:nth-child(2) { transition-delay: 0.06s; }
.mmenu.open .mmenu__item:nth-child(3) { transition-delay: 0.12s; }
.mmenu.open .mmenu__item:nth-child(4) { transition-delay: 0.18s; }
.mmenu.open .mmenu__item:nth-child(5) { transition-delay: 0.24s; }
.mmenu__item:hover { color: var(--pink-deep); }
.mmenu__num { font-size: 0.5em; color: var(--pink-deep); }
.mmenu__cta {
  margin-top: 1.4rem;
  align-self: flex-start;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  background: var(--blue-deep);
  color: var(--btn-text);
  font-weight: 700;
  text-decoration: none;
}

/* ============================================================
   水平滚动系统（3D 旋转木马 + 速度倾斜）
   ============================================================ */
.hscroll { position: relative; }
.hscroll__viewport {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  background: var(--bg-soft);
  transition: background 0.5s ease;
}
.hscroll__strip { display: flex; height: 100%; will-change: transform; }

.panel {
  position: relative;
  width: var(--vw);
  height: 100svh;
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: clamp(5.5rem, 11vh, 7.5rem) clamp(1.5rem, 6vw, 5rem) clamp(4.5rem, 9vh, 6rem);
  will-change: transform, opacity, filter;
}

.panel__head {
  position: absolute;
  top: clamp(4.6rem, 9vh, 6rem);
  left: clamp(1.5rem, 6vw, 5rem);
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  z-index: 5;
}
.panel__idx { font-size: 1.25rem; color: var(--pink-deep); }
.panel__name { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.32em; text-transform: uppercase; color: var(--muted); }

/* ============================================================
   00 首屏
   ============================================================ */
.panel--hero { isolation: isolate; justify-content: center; }
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__fallback {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(42vmax 42vmax at 68% 22%, var(--blue), transparent 70%),
    radial-gradient(34vmax 34vmax at 14% 84%, var(--pink), transparent 70%),
    var(--bg-soft);
}

/* ============================================================
   mitosis 有机 blob 揭显（参考站签名入场）
   ============================================================ */
.frame--reveal img,
.gcard img {
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-image:
    radial-gradient(circle, #000 52%, transparent 100%),
    radial-gradient(circle, #000 52%, transparent 100%),
    radial-gradient(circle, #000 52%, transparent 100%);
  mask-image:
    radial-gradient(circle, #000 52%, transparent 100%),
    radial-gradient(circle, #000 52%, transparent 100%),
    radial-gradient(circle, #000 52%, transparent 100%);
  -webkit-mask-size: 26% 26%, 30% 30%, 22% 22%;
  mask-size: 26% 26%, 30% 30%, 22% 22%;
  -webkit-mask-position: 40% 42%, 63% 60%, 52% 30%;
  mask-position: 40% 42%, 63% 60%, 52% 30%;
  transition: -webkit-mask-size 1.05s var(--ease-out), mask-size 1.05s var(--ease-out), transform 1.2s var(--ease-out);
  transform: scale(1.1);
}
body.revealed .frame--reveal img,
.panel.in .frame--reveal img,
.panel.in .gcard img {
  -webkit-mask-size: 135% 135%, 145% 145%, 125% 125%;
  mask-size: 135% 135%, 145% 145%, 125% 125%;
  transform: scale(1);
}
/* 图集卡片错峰揭显 */
.panel.in .gallery__row .gcard:nth-child(1) img { transition-delay: 0.05s; }
.panel.in .gallery__row .gcard:nth-child(2) img { transition-delay: 0.11s; }
.panel.in .gallery__row .gcard:nth-child(3) img { transition-delay: 0.17s; }
.panel.in .gallery__row .gcard:nth-child(4) img { transition-delay: 0.23s; }
.panel.in .gallery__row .gcard:nth-child(5) img { transition-delay: 0.29s; }
.panel.in .gallery__row .gcard:nth-child(6) img { transition-delay: 0.35s; }
.panel.in .gallery__row .gcard:nth-child(7) img { transition-delay: 0.41s; }
.panel.in .gallery__row .gcard:nth-child(8) img { transition-delay: 0.47s; }
.gcard img { transition: -webkit-mask-size 0.9s var(--ease-out), mask-size 0.9s var(--ease-out), transform 0.8s var(--ease-out); }
.gcard:hover img { transform: scale(1.08); transition-delay: 0s; }
.hero__grid {
  position: relative;
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.hero__eyebrow,
.hero__sub,
.hero__cta,
.hero__stats,
.hero__portrait {
  opacity: 0;
  translate: 0 26px;
  transition: opacity 0.8s ease, translate 0.9s var(--ease-out);
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--blue-deep);
}
.hero__eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--pink-deep); }

.hero__title {
  font-size: clamp(2.9rem, 6.8vw, 6.2rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 0.015em;
  margin: 1.4rem 0 1.6rem;
}
.hero__title em { font-family: "Noto Serif SC", "Songti SC", serif; font-style: normal; font-weight: 900; }

.blend { color: #fff; mix-blend-mode: difference; }

.hero__sub { max-width: 34rem; font-size: clamp(1rem, 1.3vw, 1.16rem); line-height: 1.95; color: var(--muted); }
.hero__sub strong { color: var(--blue-ink); font-weight: 700; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.1rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.95rem 1.7rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.3s, color 0.3s;
}
.btn--primary {
  position: relative;
  z-index: 0;
  overflow: hidden;
  background-image: linear-gradient(120deg, var(--btn-grad-1), var(--btn-grad-2), var(--btn-grad-1));
  background-size: 220% 100%;
  background-position: 0% 0%;
  color: var(--btn-text);
  box-shadow: 0 14px 34px -12px rgba(31, 111, 178, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.btn--primary::before {
  content: "";
  position: absolute;
  top: 0; left: -90%;
  width: 55%;
  height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  z-index: -1;
  pointer-events: none;
  transition: left 0.65s var(--ease-out);
}
.btn--primary:hover::before { left: 140%; }
.btn--primary:hover {
  background-position: 100% 0%;
  box-shadow: 0 22px 44px -12px rgba(31, 111, 178, 0.62), 0 0 0 4px rgba(154, 212, 247, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.btn--primary .arr { display: inline-block; transition: transform 0.35s var(--ease-out); }
.btn--primary:hover .arr { transform: translateX(5px); }
.btn--ghost {
  background-color: var(--surface);
  background-image: linear-gradient(120deg, var(--pink-soft), var(--blue-soft));
  background-size: 0% 100%;
  background-repeat: no-repeat;
  color: var(--blue-deep);
  border: 1.5px solid var(--blue);
}
.btn--ghost:hover { border-color: var(--pink-deep); color: var(--pink-deep); transform: translateY(-3px); background-size: 100% 100%; }
.btn--xl { padding: 1.15rem 2.2rem; font-size: 1.05rem; }

.hero__stats { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 0.9rem 1.5rem; margin-top: 2.5rem; }
.stat { display: flex; flex-direction: column; gap: 0.15rem; }
.stat__num { font-size: clamp(1.45rem, 2.3vw, 2rem); font-weight: 700; line-height: 1; color: var(--blue-ink); font-variant-numeric: tabular-nums; }
.stat__num[data-prefix]::before { content: attr(data-prefix); color: var(--pink-deep); margin-right: 0.06em; }
.stat__num[data-suffix]::after { content: attr(data-suffix); color: var(--pink-deep); margin-left: 0.06em; }
.stat__label { font-size: 0.78rem; color: var(--muted); letter-spacing: 1px; }
.stat__sep { font-family: "Instrument Serif", serif; font-style: italic; font-size: 1.25rem; color: var(--pink-deep); padding-bottom: 0.95rem; }

.hero__portrait { position: relative; justify-self: center; width: min(24rem, 80%); aspect-ratio: 1; rotate: 2deg; }
.hero__portrait .frame { position: absolute; inset: 0; border-radius: 3rem; }

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 1.7rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  opacity: 0;
  transition: opacity 0.8s ease 1.05s;
  z-index: 2;
}
body.revealed .hero__scroll { opacity: 1; }
.hero__scroll .word { font-family: "Instrument Serif", serif; font-style: italic; font-size: 1.15rem; letter-spacing: 0.04em; color: var(--blue-deep); }
.hero__scroll .arrow { animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

body.revealed .hero__eyebrow  { opacity: 1; translate: 0 0; transition-delay: 0.15s; }
body.revealed .hero__sub      { opacity: 1; translate: 0 0; transition-delay: 0.45s; }
body.revealed .hero__cta      { opacity: 1; translate: 0 0; transition-delay: 0.6s; }
body.revealed .hero__stats    { opacity: 1; translate: 0 0; transition-delay: 0.75s; }
body.revealed .hero__portrait { opacity: 1; translate: 0 0; transition-delay: 0.3s; }

/* ============================================================
   01 关于
   ============================================================ */
.about__grid {
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  flex: 1;
}
.about__text h2 { font-size: clamp(1.9rem, 3.6vw, 3.4rem); font-weight: 900; line-height: 1.45; color: var(--blue-ink); margin-bottom: 1.8rem; }
.about__text em { font-family: "Noto Serif SC", "Songti SC", serif; font-style: normal; color: var(--pink-deep); }
.about__p { color: var(--muted); font-size: clamp(0.95rem, 1.2vw, 1.1rem); line-height: 2.1; max-width: 32rem; margin-bottom: 1rem; }
.about__sign { color: var(--blue-deep); font-size: 1.25rem; margin-top: 1.4rem; }

.about__media { position: relative; }
.frame { position: relative; border-radius: 2.6rem; overflow: hidden; border: 5px solid var(--surface); box-shadow: var(--shadow); background: var(--blue-soft); }
.frame img { width: 100%; height: 100%; object-fit: cover; }
.frame--tall { width: min(21rem, 100%); aspect-ratio: 3 / 4; margin: 0 auto; }
.frame__tag {
  position: absolute;
  left: 50%;
  translate: -50% 0;
  bottom: -1.1rem;
  background: var(--surface);
  color: var(--blue-deep);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  box-shadow: var(--shadow);
  white-space: nowrap;
}

/* ============================================================
   02 栏目
   ============================================================ */
.cols__grid {
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  flex: 1;
}
.cols__preview { position: relative; }
.cols__preview .frame { width: min(20rem, 100%); aspect-ratio: 3 / 4; }
.colimg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: scale(1.07); transition: opacity 0.7s ease, transform 1.2s var(--ease-out); }
.colimg.is-show { opacity: 1; transform: scale(1); }
.cols__hint { position: absolute; right: 0; bottom: -2.4rem; color: var(--muted); font-size: 1.1rem; font-style: italic; }

.cols__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.2rem;
  padding: 1.35rem 0.9rem;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.35s, border-radius 0.35s;
}
.cols__item:first-child { border-top: 1px solid var(--line); }
.cols__item:hover, .cols__item.is-active { background: var(--surface); border-radius: 1.1rem; }
.cols__num { font-size: 1.35rem; color: var(--pink-deep); }
.cols__title { font-size: clamp(1.2rem, 2.2vw, 1.8rem); font-weight: 700; color: var(--blue-ink); line-height: 1.3; transition: translate 0.5s var(--ease-out); }
.cols__item:hover .cols__title, .cols__item.is-active .cols__title { translate: 0.5rem 0; }
.cols__desc { font-size: 0.82rem; color: var(--muted); margin-top: 0.2rem; }

/* ============================================================
   03 数据
   ============================================================ */
.data__grid {
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 1.4rem;
  align-items: stretch;
  flex: 1;
  align-content: center;
}
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 1.6rem; padding: 1.5rem 1.7rem; box-shadow: 0 18px 40px -28px rgba(13, 43, 69, 0.28); }
.data__chart { display: flex; flex-direction: column; }
.card__top { display: flex; justify-content: space-between; align-items: baseline; }
.card__label { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.14em; color: var(--muted); }
.card__delta { font-size: 0.95rem; font-weight: 700; color: var(--pink-deep); }
#growthChart { width: 100%; height: auto; margin-top: 0.8rem; }
.chart__grid line { stroke: var(--line); stroke-dasharray: 3 7; }
#lineGrad .g-stop-1 { stop-color: var(--blue-deep); }
#lineGrad .g-stop-2 { stop-color: var(--pink-deep); }
#areaGrad .a-stop-1 { stop-color: var(--blue); stop-opacity: 0.5; }
#areaGrad .a-stop-2 { stop-color: var(--blue); stop-opacity: 0; }
#chartLine { stroke-dashoffset: var(--len, 2400); transition: stroke-dashoffset 1.8s var(--ease-out) 0.35s; }
.panel.in #chartLine { stroke-dashoffset: 0; }
#chartArea { transition: opacity 1s ease 1.5s; }
.panel.in #chartArea { opacity: 1; }
.chart__dot { fill: var(--surface); stroke: var(--pink-deep); stroke-width: 3; opacity: 0; scale: 0; transition: opacity 0.45s ease, scale 0.45s var(--ease-out); }
.panel.in .chart__dot { opacity: 1; scale: 1; }
.chart__axis { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--muted); letter-spacing: 0.08em; margin-top: 0.5rem; }

.data__side { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.stat-card { display: flex; flex-direction: column; gap: 0.28rem; justify-content: center; }
.stat-card__num { font-size: clamp(1.7rem, 2.6vw, 2.4rem); font-weight: 700; color: var(--blue-ink); line-height: 1; font-variant-numeric: tabular-nums; }
.stat-card__num[data-prefix]::before { content: attr(data-prefix); color: var(--pink-deep); margin-right: 0.06em; }
.stat-card__num[data-suffix]::after { content: attr(data-suffix); color: var(--pink-deep); margin-left: 0.06em; }
.stat-card__label { font-size: 0.8rem; color: var(--muted); }
.chip { align-self: flex-start; margin-top: 0.45rem; font-size: 0.66rem; font-weight: 700; letter-spacing: 0.04em; color: var(--pink-deep); background: var(--pink-soft); border-radius: 999px; padding: 0.28rem 0.7rem; }

/* ============================================================
   04 图集
   ============================================================ */
.gallery__rows {
  position: absolute;
  inset: clamp(7rem, 15vh, 9rem) 0 clamp(4rem, 8vh, 5.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.2rem;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 6%, #000 94%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 6%, #000 94%, transparent 100%);
}
.gallery__row { display: flex; gap: 1.1rem; will-change: transform; }
.gallery__row--b { margin-left: -7vw; }
.gallery__title {
  position: absolute;
  top: clamp(6.5rem, 13vh, 8rem);
  right: clamp(1.5rem, 6vw, 5rem);
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  font-weight: 900;
  color: var(--blue-ink);
  z-index: 3;
}
.gallery__title .serif { color: var(--pink-deep); font-weight: 400; }

.gcard {
  position: relative;
  flex: 0 0 auto;
  width: clamp(148px, 16.5vw, 232px);
  aspect-ratio: 3 / 4;
  border-radius: 1.4rem;
  overflow: hidden;
  border: 4px solid var(--surface);
  box-shadow: 0 16px 36px -22px rgba(13, 43, 69, 0.4);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s;
}
.gcard img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease-out); }
.gcard:hover { transform: translateY(-9px) rotate(-1deg); box-shadow: 0 28px 52px -22px rgba(13, 43, 69, 0.5); z-index: 2; }
.gcard:hover img { transform: scale(1.08); }
.gcard figcaption {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 0.95rem;
  background: linear-gradient(transparent, rgba(10, 26, 43, 0.6));
  color: #fff;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  opacity: 0;
  translate: 0 8px;
  transition: opacity 0.4s, translate 0.5s var(--ease-out);
}
.gcard:hover figcaption { opacity: 1; translate: 0 0; }
.gcard__num { font-family: "Instrument Serif", serif; font-style: italic; font-size: 1.05rem; }

/* ============================================================
   05 加入
   ============================================================ */
.panel--join { align-items: center; justify-content: center; text-align: center; }
.join__watermark { position: absolute; font-size: min(44vh, 38vw); opacity: 0.1; rotate: -14deg; pointer-events: none; user-select: none; line-height: 1; }
.join__inner { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }
.join__kicker { font-size: clamp(1.4rem, 2.4vw, 2rem); color: var(--pink-deep); }
.join__title { font-size: clamp(2rem, 4.2vw, 3.6rem); font-weight: 900; line-height: 1.4; color: var(--blue-ink); }
.join__title em { font-family: "Noto Serif SC", "Songti SC", serif; font-style: normal; color: var(--pink-deep); }
.join__cta { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 0.4rem; }
.join__link { font-size: clamp(1.3rem, 2.2vw, 1.9rem); color: var(--blue-deep); margin-top: 0.6rem; }
.join__note { font-size: 0.85rem; color: var(--muted); }
.join__note strong { color: var(--blue-ink); }

/* ============================================================
   页脚
   ============================================================ */
.footer {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 800;
  opacity: 0;
  translate: 0 100%;
  transition: opacity 0.5s ease, translate 0.6s var(--ease-out);
  pointer-events: none;
}
.footer.show { opacity: 1; translate: 0 0; pointer-events: auto; }
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1.2rem, 4vw, 2.5rem);
  font-size: 0.76rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.footer__left { display: flex; align-items: center; gap: 0.5rem; min-width: 5.5rem; }
.footer__scroll { font-size: 1.05rem; color: var(--blue-deep); }
.footer__arrow { animation: bob 1.8s ease-in-out infinite; color: var(--pink-deep); }
.footer__right { display: flex; align-items: center; gap: 1.1rem; flex-wrap: wrap; justify-content: flex-end; }
.footer__counter { font-variant-numeric: tabular-nums; color: var(--blue-ink); font-weight: 700; }
.footer a { color: var(--blue-deep); text-decoration: none; transition: color 0.3s; }
.footer a:hover { color: var(--pink-deep); }
.footer__progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--blue-soft); }
#progressBar { display: block; height: 100%; width: 100%; transform-origin: left; transform: scaleX(0); background: linear-gradient(90deg, var(--blue-deep), var(--pink-deep)); }

/* ============================================================
   响应式（<1024px 垂直堆叠）
   ============================================================ */
@media (max-width: 1023px) {
  .nav__links { display: none; }
  .burger { display: grid; }

  .hscroll__viewport { position: static; height: auto; overflow: visible; }
  .hscroll__strip { display: block; height: auto; transform: none !important; }
  .panel {
    width: 100%;
    height: auto;
    min-height: 100svh;
    padding: clamp(6rem, 12vh, 8rem) 1.4rem clamp(4.5rem, 9vh, 6rem);
  }
  .panel__head { left: 1.4rem; }

  .hero__grid, .about__grid, .cols__grid, .data__grid { grid-template-columns: 1fr; height: auto; gap: 2.4rem; flex: none; }
  .hero__portrait { width: min(14rem, 58%); }
  .hero__scroll { display: none; }
  .about__media { max-width: 20rem; justify-self: center; width: 100%; }
  .cols__preview .frame { width: min(17rem, 80%); }
  .cols__hint { position: static; display: block; text-align: center; margin-top: 1rem; }
  .data__side { grid-template-columns: 1fr 1fr; }

  .gallery__rows { position: static; inset: auto; margin-top: 1.6rem; gap: 1rem; }
  .gallery__row { overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 0.8rem; scrollbar-width: none; }
  .gallery__row::-webkit-scrollbar { display: none; }
  .gallery__row--b { margin-left: 0; }
  .gcard { scroll-snap-align: center; width: 46vw; }
  .gallery__title { position: static; margin-bottom: 0.4rem; }

  .plx { transform: none !important; }

  .panel--join { min-height: 86svh; }
  .join__watermark { font-size: 62vw; }

  .footer { position: static; opacity: 1; translate: 0; pointer-events: auto; border-top: 1px solid var(--line); margin-top: 1.5rem; }
  .footer__progress { display: none; }
  .footer__inner { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
}

@media (max-width: 480px) {
  .brand__name { font-size: 0.9rem; }
  .nav__cta { padding: 0.55rem 1rem; font-size: 0.82rem; }
  .hero__stats { gap: 0.8rem 1.1rem; }
  .stat__sep { display: none; }
  .data__side { grid-template-columns: 1fr; }
  .gcard { width: 62vw; }
}

/* ---------- 动效减弱 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  html { scroll-behavior: auto; }
  .ch > i { transform: none !important; }
}