/* ============================================================
   洛克闹 Local & Now · 黑金分页式官网
   全屏 snap 翻页 + 电影感慢镜头进场
   ============================================================ */

:root {
  /* — 色彩系统 — */
  --bg: #0a0a0a;
  --bg-2: #0f0f10;
  --bg-3: #131315;
  --ink: #f0ece4;
  --ink-dim: #8e8a82;
  --ink-faint: #5a564f;
  --gold: #c9a35c;
  --gold-bright: #e7c280;
  --gold-deep: #8a6e3a;
  --line: rgba(201, 163, 92, 0.22);
  --line-soft: rgba(201, 163, 92, 0.10);

  /* — 节奏曲线 — */
  --ease-out-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out-cinema: cubic-bezier(0.16, 0.84, 0.32, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* — 字体 — */
  --serif-zh: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --serif-en: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --sans: "Inter", -apple-system, "Helvetica Neue", "PingFang SC", sans-serif;
}

/* ============================================================
   全局重置
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif-zh);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow: hidden;       /* 翻页主体接管滚动 */
  overscroll-behavior: none;
}

body {
  /* 默认禁选 — BP 阅读区下面再开 */
  user-select: none;
  -webkit-user-select: none;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: transparent; color: inherit; }
em, i { font-family: var(--serif-en); font-style: italic; }

/* ============================================================
   翻页主体 — scroll-snap
   ============================================================ */
.deck {
  height: 100vh;
  height: 100dvh;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
}
.deck::-webkit-scrollbar { display: none; }

.page {
  height: 100vh;
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  isolation: isolate;
}

.page-inner {
  width: min(1100px, 88vw);
  position: relative;
  z-index: 2;
  text-align: center;
}

/* ============================================================
   背景层 — 每页独立的微推近 + 渐变 + 颗粒
   ============================================================ */
.page-bg {
  position: absolute;
  inset: -4%;
  z-index: 0;
  background: var(--bg);
  transform: scale(1.06);
  opacity: 0;
  transition:
    transform 2200ms var(--ease-out-cinema),
    opacity 1400ms var(--ease-out-soft);
}
.page.is-active .page-bg {
  transform: scale(1);
  opacity: 1;
}

.page-bg-hero {
  /* hero 现在用 .hero-photo 真照片做背景，这里只留兜底色 */
  background: var(--bg);
}

/* ============================================================
   通用全屏背景图 (.bg-photo) — 所有 page 共用
   - 4K Unsplash CDN
   - 提亮 + 虚化 + ken-burns
   ============================================================ */
.bg-photo {
  position: absolute;
  inset: -8%;
  width: 116%;
  height: 116%;
  object-fit: cover;
  z-index: 0;
  opacity: 0;
  transform: scale(1.07);
  filter: brightness(0.62) saturate(1.08) contrast(1.02) blur(8px);
  transition:
    opacity 1800ms var(--ease-out-cinema),
    transform 14000ms linear,
    filter 1800ms ease-out;
  will-change: transform, opacity;
  pointer-events: none;
}
.page.is-active .bg-photo {
  opacity: 1;
  transform: scale(1);
}
.bg-photo.is-fallback {
  filter: brightness(0.95) saturate(1) contrast(1) blur(0);
}

/* 文字可读性遮罩（无框、靠遮罩 + 文字阴影） */
.bg-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.32) 0%, rgba(0,0,0,0) 22%),
    linear-gradient(0deg, rgba(0,0,0,0.42) 0%, rgba(0,0,0,0) 28%),
    radial-gradient(ellipse at 50% 50%, rgba(0,0,0,0.28) 0%, transparent 70%),
    rgba(0,0,0,0.18);
}
.bg-veil-dark {
  background:
    linear-gradient(180deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0) 26%),
    linear-gradient(0deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0) 30%),
    radial-gradient(ellipse at 50% 50%, rgba(0,0,0,0.36) 0%, transparent 70%),
    rgba(0,0,0,0.32);
}

/* ============================================================
   文字阴影 — 直接落在背景图上,无需玻璃面板
   ============================================================ */
.page-hero .page-inner,
.page-mission .page-inner,
.page-problem .page-inner,
.page-philosophy .page-inner,
.page-bp .page-inner {
  text-shadow:
    0 1px 2px rgba(0,0,0,0.45),
    0 2px 16px rgba(0,0,0,0.35);
}
.bp-toolbar, .bp-frame-wrap, .pw-input, .unlock-form .btn,
.bp-actions a, .bp-actions button {
  text-shadow: none;
}

/* 顶部 eyebrow */
.hero-eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 5px;
  color: var(--gold);
  opacity: 0.85;
  margin-bottom: 22px;
  text-transform: uppercase;
}

/* lede 引导段：1~2 行,文字大气、克制 */
.hero-lede {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(16px, 1.4vw, 21px);
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: rgba(240, 236, 228, 0.78);
  max-width: 640px;
  margin: 32px auto 0;
}

/* CTA 区 */
.hero-cta {
  margin-top: 36px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-cta-link {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 6px 2px;
  border-bottom: 1px solid transparent;
  transition: all 280ms var(--ease-out-soft);
}
.hero-cta-link:hover { color: var(--ink); border-bottom-color: rgba(255,255,255,0.4); }
.hero-cta-link.gold { color: var(--gold); border-bottom-color: rgba(201,163,92,0.4); }
.hero-cta-link.gold:hover { color: var(--gold-bright); border-bottom-color: var(--gold-bright); }
.hero-cta-sep { color: var(--ink-faint); }
/* 背景图未加载时的兜底色 */
.page-bg-mission, .page-bg-problem, .page-bg-philosophy, .page-bg-bp { background: var(--bg); }

/* 颗粒噪点 — SVG inline,营造胶片质感 */
.page-grain {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.9  0 0 0 0 0.85  0 0 0 0 0.7  0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ============================================================
   元素动画基线 — data-anim
   每一帧默认隐藏 + 下沉;is-active 时按 stagger 进入
   ============================================================ */
[data-anim] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 900ms var(--ease-out-cinema),
    transform 1100ms var(--ease-out-cinema);
  will-change: opacity, transform;
}
.page.is-active [data-anim] {
  opacity: 1;
  transform: translateY(0);
}

/* stagger — 每个 data-anim 多延迟 120ms,加 200ms 基础延迟让"背景先到位" */
.page.is-active [data-anim="0"] { transition-delay: 220ms; }
.page.is-active [data-anim="1"] { transition-delay: 340ms; }
.page.is-active [data-anim="2"] { transition-delay: 460ms; }
.page.is-active [data-anim="3"] { transition-delay: 580ms; }
.page.is-active [data-anim="4"] { transition-delay: 700ms; }
.page.is-active [data-anim="5"] { transition-delay: 820ms; }
.page.is-active [data-anim="6"] { transition-delay: 940ms; }
.page.is-active [data-anim="7"] { transition-delay: 1060ms; }

/* 离场也要有节奏 — 翻走时显得有"收回"动作 */
.page:not(.is-active) [data-anim] {
  transition-duration: 500ms;
  transition-delay: 0ms;
}

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 22px 40px;
  display: flex;
  justify-content: center;
  pointer-events: none;
  transition: opacity 600ms var(--ease-out-soft), transform 600ms var(--ease-out-soft);
}
.nav-inner {
  width: min(1400px, 96vw);
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: auto;
}
.nav-brand { display: flex; align-items: baseline; gap: 12px; transition: opacity 300ms; }
.nav-brand:hover { opacity: 0.75; }
.brand-zh { font-family: var(--serif-zh); font-weight: 500; font-size: 17px; letter-spacing: 4px; color: var(--ink); }
.brand-en { font-family: var(--serif-en); font-style: italic; font-size: 14px; color: var(--gold); letter-spacing: 0.5px; }

.nav-bp {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 2.5px;
  color: var(--gold);
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 1px;
  transition: all 280ms var(--ease-out-soft);
}
.nav-bp:hover {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}

/* hero 页隐藏导航,避免压字 */
body[data-active-page="0"] .nav { opacity: 0; transform: translateY(-10px); pointer-events: none; }

/* ============================================================
   右侧分页指示器
   ============================================================ */
.pager {
  position: fixed;
  right: 36px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 18px;
  pointer-events: auto;
}
.pager-dot {
  width: 26px;
  height: 1px;
  background: transparent;
  transition: all 500ms var(--ease-out-soft);
  padding: 8px 0;
  position: relative;
}
.pager-dot::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
  transition: all 500ms var(--ease-out-soft);
}
.pager-dot:hover::before { background: var(--gold); width: 32px; }
.pager-dot.is-active::before {
  background: var(--gold);
  width: 40px;
  box-shadow: 0 0 8px rgba(201, 163, 92, 0.5);
}

/* ============================================================
   滚动提示
   ============================================================ */
.scroll-hint {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  transition: opacity 600ms var(--ease-out-soft), transform 600ms;
}
.scroll-hint-text {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--ink-dim);
}
.scroll-hint-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, var(--gold) 0%, transparent 100%);
  position: relative;
  overflow: hidden;
}
.scroll-hint-line::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--gold-bright), transparent);
  animation: scrollHint 2.2s var(--ease-in-out) infinite;
}
@keyframes scrollHint {
  0%   { top: -100%; }
  60%  { top: 100%; }
  100% { top: 100%; }
}
/* 非首页隐藏 */
body:not([data-active-page="0"]) .scroll-hint { opacity: 0; transform: translate(-50%, 20px); }

/* ============================================================
   PAGE 1 · HERO
   ============================================================ */
.hero-corner {
  position: absolute;
  z-index: 2;
  width: 28px;
  height: 28px;
}
.hero-corner span {
  position: absolute;
  background: var(--gold);
  opacity: 0.7;
}
.hero-corner span:nth-child(1) { left: 0; top: 0; width: 28px; height: 1px; }
.hero-corner span:nth-child(2) { left: 0; top: 0; width: 1px; height: 28px; }
.hero-corner-tl { left: 36px; top: 36px; }
.hero-corner-tr { right: 36px; top: 36px; transform: rotate(90deg); }
.hero-corner-bl { left: 36px; bottom: 36px; transform: rotate(270deg); }
.hero-corner-br { right: 36px; bottom: 36px; transform: rotate(180deg); }

.hero-inner { text-align: center; }
.hero-cn-name {
  font-family: var(--serif-zh);
  font-weight: 300;
  font-size: clamp(16px, 1.4vw, 20px);
  letter-spacing: 0.5em;
  color: var(--gold);
  margin-bottom: 22px;
  text-shadow: 0 0 18px rgba(201, 163, 92, 0.25);
}
.hero-title {
  font-family: var(--serif-en);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(74px, 12.5vw, 200px);
  letter-spacing: 0.005em;
  line-height: 0.92;
  color: var(--ink);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink) 55%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0;
}
.hero-rule {
  width: 120px;
  height: 1px;
  background: var(--gold);
  margin: 36px auto 30px;
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 1500ms var(--ease-out-cinema);
  transition-delay: 1200ms;
  box-shadow: 0 0 12px rgba(201, 163, 92, 0.35);
}
.page.is-active .hero-rule { transform: scaleX(1); }

.hero-zh {
  font-family: var(--serif-zh);
  font-weight: 400;
  font-size: clamp(22px, 2.1vw, 30px);
  letter-spacing: 0.28em;
  color: var(--ink);
  margin-bottom: 14px;
}
.hero-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(15px, 1.25vw, 19px);
  letter-spacing: 0.06em;
  color: var(--gold);
  opacity: 0.88;
}

.hero-confidential {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(14px);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 4px;
  color: rgba(240, 236, 228, 0.75);
  z-index: 3;
  text-shadow: 0 1px 6px rgba(0,0,0,0.6);
  opacity: 0;
  transition: opacity 900ms var(--ease-out-cinema), transform 900ms var(--ease-out-cinema);
}
.page.is-active .hero-confidential {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  transition-delay: 1700ms;
}

/* ============================================================
   语言切换器（右上角，只在 hero 页可见）
   ============================================================ */
.lang-switch {
  position: fixed;
  top: 22px;
  right: 90px;        /* 避开 BP 按钮 */
  z-index: 110;
  font-family: var(--sans);
  pointer-events: auto;
  transition: opacity 500ms var(--ease-out-soft), transform 500ms var(--ease-out-soft);
}
/* 全局可见,但非首页时更克制 */
body:not([data-active-page="0"]) .lang-current {
  background: rgba(8, 8, 10, 0.30);
  opacity: 0.7;
}
body:not([data-active-page="0"]) .lang-current:hover { opacity: 1; }

.lang-current {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 2.5px;
  color: var(--ink);
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(8, 8, 10, 0.35);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: 1px;
  cursor: pointer;
  transition: all 260ms var(--ease-out-soft);
  text-transform: uppercase;
}
.lang-current:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.lang-current svg { transition: transform 280ms var(--ease-out-soft); }
.lang-switch.is-open .lang-current svg { transform: rotate(180deg); }
.lang-switch.is-open .lang-current { border-color: var(--gold); color: var(--gold); }

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 168px;
  list-style: none;
  padding: 6px;
  margin: 0;
  background: rgba(10, 10, 12, 0.78);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid rgba(201, 163, 92, 0.25);
  border-radius: 2px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transform-origin: top right;
  transition: all 280ms var(--ease-out-soft);
}
.lang-switch.is-open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.lang-menu li { margin: 0; padding: 0; }
.lang-menu button {
  width: 100%;
  display: block;
  text-align: left;
  padding: 10px 14px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--ink);
  background: transparent;
  border: none;
  border-radius: 1px;
  cursor: pointer;
  transition: all 200ms var(--ease-out-soft);
  font-family: inherit;
}
.lang-menu button:hover {
  background: rgba(201, 163, 92, 0.12);
  color: var(--gold);
  padding-left: 18px;
}
.lang-menu button.is-active {
  color: var(--gold);
  background: rgba(201, 163, 92, 0.06);
}
.lang-menu button.is-active::before {
  content: "·";
  margin-right: 8px;
  color: var(--gold);
}

/* ============================================================
   通用 section-label
   ============================================================ */
.section-label {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 5px;
  color: var(--ink-dim);
  margin-bottom: 60px;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.section-label .num {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 14px;
  color: var(--gold);
}

/* ============================================================
   PAGE 2 · MISSION
   ============================================================ */
.big-quote { position: relative; max-width: 900px; margin: 0 auto; }
.quote-mark {
  display: inline-block;
  font-family: var(--serif-en);
  font-size: 110px;
  line-height: 1;
  color: var(--gold);
  margin-bottom: -20px;
  margin-left: -30px;
}
.quote-line {
  font-family: var(--serif-zh);
  font-weight: 400;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 8px;
}
.quote-line.gold-line { color: var(--ink); }
.quote-line.gold-line.big { margin-bottom: 36px; }
.gold-em {
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 70%, var(--gold-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 500;
  font-size: 1.18em;
  text-shadow: 0 0 30px rgba(201, 163, 92, 0.2);
  padding: 0 0.08em;
}
.quote-sub-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(15px, 1.3vw, 19px);
  color: var(--ink-dim);
  letter-spacing: 0.05em;
}

/* ============================================================
   PAGE 3 · PROBLEM (信息真空)
   ============================================================ */
.four-char-wrap {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 4vw, 60px);
  margin: 40px 0 50px;
}
.four-char {
  font-family: var(--serif-zh);
  font-weight: 500;
  font-size: clamp(72px, 12vw, 180px);
  line-height: 1;
  letter-spacing: 0;
  color: var(--ink);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink) 50%, var(--gold-deep) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
/* 非 CJK 主标题 */
.problem-headline {
  display: none;
  font-family: var(--serif-en);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(48px, 8vw, 120px);
  line-height: 1;
  margin: 40px 0 50px;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink) 50%, var(--gold-deep) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.005em;
}
.lang-cjk .four-char-wrap { display: flex; }
.lang-cjk .problem-headline { display: none; }
.lang-latin .four-char-wrap { display: none; }
.lang-latin .problem-headline { display: block; }

.problem-rule {
  width: 60px;
  height: 1px;
  background: var(--gold);
  margin: 0 auto 26px;
  transform-origin: center;
  transform: scaleX(0);
  opacity: 1 !important;
  transition: transform 1200ms var(--ease-out-cinema);
  transition-delay: 820ms;
}
.page.is-active .problem-rule { transform: scaleX(1); }
.problem-sub {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(17px, 1.5vw, 22px);
  color: var(--gold);
  letter-spacing: 0.05em;
  margin-bottom: 22px;
}
.problem-tag {
  font-family: var(--serif-zh);
  font-weight: 300;
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--ink-dim);
  letter-spacing: 0.18em;
}

/* ============================================================
   PAGE 4 · PHILOSOPHY
   ============================================================ */
.ending-line {
  font-family: var(--serif-zh);
  font-weight: 400;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.6;
  letter-spacing: 0.1em;
}
.ending-line.dim { color: var(--ink-dim); }
.ending-line.gold {
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold) 60%, var(--gold-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 500;
}
.ending-rule {
  width: 90px;
  height: 1px;
  background: var(--gold);
  margin: 32px auto;
  transform-origin: center;
  transform: scaleX(0);
  opacity: 1 !important;
  transition: transform 1200ms var(--ease-out-cinema);
  transition-delay: 700ms;
}
.page.is-active .ending-rule { transform: scaleX(1); }
.ending-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: clamp(16px, 1.35vw, 20px);
  color: var(--ink-dim);
  letter-spacing: 0.08em;
  margin-top: 36px;
}

/* ============================================================
   PAGE 5 · BP
   ============================================================ */
.page-inner-bp { max-width: 760px; }
.bp-gate { text-align: center; }
.lock-icon {
  display: inline-flex;
  width: 78px;
  height: 78px;
  border: 1px solid var(--line);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  margin-bottom: 26px;
  background: rgba(201, 163, 92, 0.04);
  box-shadow: 0 0 30px rgba(201, 163, 92, 0.08), inset 0 0 30px rgba(201, 163, 92, 0.04);
}
.bp-title {
  font-family: var(--serif-zh);
  font-weight: 500;
  font-size: clamp(34px, 3.6vw, 48px);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
  color: var(--ink);
}
.bp-subtitle {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 18px;
  color: var(--gold);
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}
.bp-rule {
  width: 60px;
  height: 1px;
  background: var(--gold);
  margin: 0 auto 26px;
  transform-origin: center;
  transform: scaleX(0);
  opacity: 1 !important;
  transition: transform 1100ms var(--ease-out-cinema);
  transition-delay: 700ms;
}
.page.is-active .bp-rule { transform: scaleX(1); }
.bp-gate-text {
  font-family: var(--serif-zh);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
  letter-spacing: 0.08em;
  margin-bottom: 36px;
}
.bp-gate-text .dim { color: var(--ink-dim); }

.unlock-form {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: stretch;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
}
.pw-input {
  flex: 1 1 240px;
  min-width: 200px;
  padding: 14px 18px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 1px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 4px;
  outline: none;
  transition: all 300ms var(--ease-out-soft);
  user-select: text;
  -webkit-user-select: text;
}
.pw-input::placeholder { color: var(--ink-faint); letter-spacing: 2px; }
.pw-input:focus {
  border-color: var(--gold);
  background: rgba(201, 163, 92, 0.04);
  box-shadow: 0 0 0 3px rgba(201, 163, 92, 0.08);
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 3px;
  padding: 14px 28px;
  border: 1px solid transparent;
  border-radius: 1px;
  cursor: pointer;
  transition: all 320ms var(--ease-out-soft);
  text-transform: uppercase;
  white-space: nowrap;
}
.btn-gold {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
  box-shadow: 0 0 24px rgba(201, 163, 92, 0.15);
}
.btn-gold:hover {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
  box-shadow: 0 0 32px rgba(231, 194, 128, 0.32);
  transform: translateY(-1px);
}
.btn-gold:active { transform: translateY(0); }
.btn-gold:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

.btn-text { background: transparent; color: var(--ink-dim); border: none; padding: 8px 12px; }
.btn-text:hover { color: var(--gold); }

.btn-sm { font-size: 11px; padding: 9px 18px; letter-spacing: 2.5px; }

.pw-error {
  margin-top: 18px;
  font-family: var(--sans);
  font-size: 13px;
  color: #d8665d;
  letter-spacing: 1px;
}

/* ============================================================
   BP 已解锁视图
   ============================================================ */
.bp-viewer { text-align: left; user-select: text; -webkit-user-select: text; }
.bp-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  background: rgba(201, 163, 92, 0.03);
  flex-wrap: wrap;
  gap: 10px;
}
.bp-status {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
  animation: dotPulse 2.4s var(--ease-in-out) infinite;
}
@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.bp-actions { display: inline-flex; gap: 8px; flex-wrap: wrap; }

.bp-frame-wrap {
  width: 100%;
  height: 70vh;
  background: var(--bg-3);
  border: 1px solid var(--line);
}
.bp-frame { width: 100%; height: 100%; border: none; background: var(--bg); }

.footer-mini {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--ink-faint);
  z-index: 2;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  /* 导航 */
  .nav { padding: 14px 18px; }
  .brand-zh { font-size: 14px; letter-spacing: 3px; }
  .brand-en { font-size: 11px; }
  .nav-bp { font-size: 10px; padding: 5px 10px; letter-spacing: 1.5px; }

  /* 语言切换器 */
  .lang-switch { top: 14px; right: 14px; }
  .lang-current { padding: 5px 10px; font-size: 10px; letter-spacing: 1.5px; }
  .lang-menu { min-width: 152px; }
  .lang-menu button { padding: 9px 12px; font-size: 12px; }
  body[data-active-page="0"] .nav-bp { display: none; }

  /* pager */
  .pager { right: 10px; gap: 12px; }
  .pager-dot, .pager-dot::before { width: 16px; }
  .pager-dot.is-active::before { width: 24px; }

  .page-inner { width: 90vw; }

  /* hero 边角点 */
  .hero-corner { width: 14px; height: 14px; }
  .hero-corner span:nth-child(1) { width: 14px; }
  .hero-corner span:nth-child(2) { height: 14px; }
  .hero-corner-tl { left: 14px; top: 14px; }
  .hero-corner-tr { right: 14px; top: 14px; }
  .hero-corner-bl { left: 14px; bottom: 14px; }
  .hero-corner-br { right: 14px; bottom: 14px; }

  /* hero 文字 */
  .hero-eyebrow { font-size: 9px; letter-spacing: 3px; margin-bottom: 18px; }
  .hero-cn-name { font-size: 13px; letter-spacing: 0.42em; margin-bottom: 16px; }
  .hero-title { font-size: clamp(48px, 14vw, 78px); line-height: 0.95; }
  .hero-rule { width: 70px; margin: 22px auto 20px; }
  .hero-zh { font-size: 17px; letter-spacing: 0.22em; }
  .hero-en { font-size: 13px; }
  .hero-lede {
    font-size: 14px;
    line-height: 1.65;
    margin: 22px auto 0;
    max-width: 100%;
  }
  .hero-cta { gap: 12px; margin-top: 28px; flex-direction: column; align-items: center; }
  .hero-cta-link { font-size: 10px; letter-spacing: 2px; }
  .hero-cta-sep { display: none; }
  .hero-confidential { font-size: 9px; letter-spacing: 3px; bottom: 26px; }

  /* section-label */
  .section-label { font-size: 10px; letter-spacing: 3px; margin-bottom: 36px; }

  /* page-2 essence */
  .quote-mark { font-size: 60px; margin-left: 0; margin-bottom: -10px; }
  .quote-line { font-size: clamp(24px, 7vw, 36px); line-height: 1.45; letter-spacing: 0.05em; }
  .quote-line.gold-line.big { margin-bottom: 24px; }
  .gold-em { font-size: 1.12em; }
  .quote-sub-en { font-size: 13px; }

  /* page-3 problem */
  .four-char-wrap { gap: 10px; margin: 24px 0 32px; }
  .four-char { font-size: clamp(54px, 16vw, 84px); }
  .problem-headline { font-size: clamp(36px, 11vw, 64px); margin: 24px 0 32px; }
  .problem-rule { width: 50px; margin-bottom: 20px; }
  .problem-sub { font-size: 15px; margin-bottom: 16px; }
  .problem-tag { font-size: 12px; letter-spacing: 0.1em; line-height: 1.7; max-width: 100%; }

  /* page-4 philosophy */
  .ending-line { font-size: clamp(22px, 6.5vw, 34px); line-height: 1.55; letter-spacing: 0.06em; }
  .ending-rule { width: 70px; margin: 22px auto; }
  .ending-en { font-size: 13px; margin-top: 24px; }

  /* page-5 BP */
  .lock-icon { width: 60px; height: 60px; margin-bottom: 18px; }
  .lock-icon svg { width: 32px; height: 32px; }
  .bp-title { font-size: clamp(26px, 7.5vw, 36px); }
  .bp-subtitle { font-size: 14px; margin-bottom: 16px; }
  .bp-rule { width: 50px; margin-bottom: 18px; }
  .bp-gate-text { font-size: 13px; line-height: 1.75; margin-bottom: 24px; }
  .unlock-form { flex-direction: column; gap: 10px; max-width: 320px; }
  .pw-input { width: 100%; font-size: 13px; letter-spacing: 3px; padding: 12px 16px; }
  .btn { width: 100%; font-size: 12px; padding: 12px 20px; letter-spacing: 2.5px; }
  .bp-toolbar { padding: 8px 12px; flex-direction: column; align-items: stretch; gap: 8px; }
  .bp-status { justify-content: center; }
  .bp-actions { justify-content: center; }
  .bp-actions .btn-sm { width: auto; flex: 1 1 0; min-width: 80px; }
  .bp-frame-wrap { height: 56vh; }

  /* scroll hint */
  .scroll-hint { bottom: 22px; }
  .scroll-hint-text { font-size: 9px; }
  .scroll-hint-line { height: 28px; }

  /* footer */
  .footer-mini { font-size: 9px; letter-spacing: 2px; }
}

/* 超小屏 */
@media (max-width: 380px) {
  .hero-title { font-size: clamp(40px, 13vw, 60px); }
  .four-char { font-size: clamp(46px, 15vw, 68px); }
  .quote-line { font-size: clamp(20px, 6.5vw, 30px); }
  .ending-line { font-size: clamp(18px, 6vw, 28px); }
  .bp-title { font-size: 24px; }
  .pager { display: none; }
}

/* ============================================================
   prefers-reduced-motion — 尊重系统设置
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 200ms !important;
    scroll-behavior: auto !important;
  }
  [data-anim] { opacity: 1; transform: none; }
}