/* ============================================================================
 * CINEPHILE · 全局样式（设计系统 + 布局 + 导航 + 通用组件 + 动效）
 * 深色电影感 · 黑金 · 胶片颗粒 · 衬线大标题
 * ========================================================================== */

/* ----------------------------------------------------------------------------
 * 1. 设计变量
 * -------------------------------------------------------------------------- */
:root {
  /* 色板 · 深色电影感 */
  --bg:        #0B0B0F;   /* 页面底色，近黑带一点蓝 */
  --bg-soft:   #121218;   /* 卡片底色 */
  --bg-card:   #16161E;   /* 面板底色 */
  --bg-raised: #1B1B25;   /* 悬浮面板 */
  --line:      rgba(255, 255, 255, 0.08);   /* 细分隔线 */
  --line-strong: rgba(201, 169, 106, 0.28); /* 金色分隔线 */
  --text:      #ECE8E1;   /* 主文字，暖白 */
  --text-dim:  #9B958B;   /* 次级文字 */
  --text-faint:#6A655C;   /* 弱化文字 */
  --gold:      #C9A96A;   /* 主点缀金色 */
  --gold-bright:#E2C98C;  /* 亮金 */
  --gold-deep: #8A6F3C;   /* 暗金 */
  --amber:     #D9A05B;   /* 琥珀 */
  --teal:      #7FA7A0;   /* 点缀青（少量） */
  --danger:    #C96A5F;

  /* 字体 */
  --font-serif: "Cormorant Garamond", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans:  "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 字号阶梯 */
  --fs-hero:  clamp(3rem, 9vw, 7.5rem);
  --fs-h1:    clamp(2rem, 5vw, 3.5rem);
  --fs-h2:    clamp(1.6rem, 3.5vw, 2.4rem);
  --fs-h3:    1.35rem;
  --fs-body:  1rem;
  --fs-small: 0.85rem;
  --fs-micro: 0.72rem;

  /* 间距 */
  --space-page: clamp(1.25rem, 5vw, 4rem);
  --space-section: clamp(4rem, 10vw, 8rem);
  --radius: 2px;
  --radius-lg: 6px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.5s;
}

/* ----------------------------------------------------------------------------
 * 2. 基础重置
 * -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

/* 胶片颗粒质感层：覆盖全屏，pointer-events 穿透 */
.film-grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.055;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grainShift 0.8s steps(2) infinite;
}
@keyframes grainShift {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-2%, 1%); }
  50% { transform: translate(1%, -2%); }
  75% { transform: translate(-1%, 2%); }
  100% { transform: translate(2%, 0); }
}

/* 电影上下黑边（信箱框），仅桌面全屏时显示氛围 */
::selection { background: rgba(201, 169, 106, 0.35); color: #fff; }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; background: none; border: none; color: inherit; }
input, textarea, select { font-family: inherit; }

/* ----------------------------------------------------------------------------
 * 3. 版式工具
 * -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-page);
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}
.eyebrow::before {
  content: "";
  width: 2.2rem;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: var(--text);
  margin-top: 1.1rem;
}
.section-title em {
  font-style: italic;
  color: var(--gold-bright);
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.section-head .lead {
  color: var(--text-dim);
  max-width: 34rem;
  font-weight: 300;
}

/* 衬线英文大标题（Cinevici 式装饰） */
.serif-en {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: 0.08em;
}

/* ----------------------------------------------------------------------------
 * 4. 导航
 * -------------------------------------------------------------------------- */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem var(--space-page);
  transition: background var(--dur) var(--ease-soft), padding var(--dur) var(--ease-soft), border-color var(--dur);
  border-bottom: 1px solid transparent;
}
.topbar.scrolled {
  background: rgba(11, 11, 15, 0.82);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
  padding: 0.7rem var(--space-page);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.brand-mark {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--gold);
  position: relative;
  display: grid;
  place-items: center;
  transition: transform var(--dur) var(--ease);
}
.brand-mark::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  border: 1px solid var(--gold-bright);
  transform: rotate(45deg);
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0.32rem;
  border: 1px solid var(--line-strong);
  transform: rotate(45deg);
}
.brand-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  color: var(--text);
  white-space: nowrap;
}
.brand-name small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.58rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  text-transform: uppercase;
  margin-top: 0.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}
.nav-link {
  position: relative;
  padding: 0.55rem 1rem;
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  transition: color var(--dur) var(--ease-soft);
}
.nav-link .nav-icon {
  margin-right: 0.35rem;
  font-size: 0.72rem;
  color: var(--gold);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--dur), transform var(--dur);
}
.nav-link:hover { color: var(--text); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 1rem; right: 1rem; bottom: 0.3rem;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav-link.active { color: var(--text); }
.nav-link.active .nav-icon { opacity: 1; transform: translateX(0); }
.nav-link.active::after { transform: scaleX(1); }
.nav-lock {
  margin-left: 0.35rem;
  font-size: 0.7rem;
  opacity: 0.9;
  vertical-align: 0.08em;
  filter: saturate(0.9);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.6rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform var(--dur) var(--ease), opacity var(--dur);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ----------------------------------------------------------------------------
 * 5. 页脚
 * -------------------------------------------------------------------------- */
.site-footer {
  margin-top: var(--space-section);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg), #0E0E14);
  padding: 4rem 0 2.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand .brand-name { font-size: 1.4rem; }
.footer-brand p {
  color: var(--text-dim);
  font-weight: 300;
  max-width: 24rem;
  margin-top: 1rem;
  font-size: 0.9rem;
}
.footer-col h4 {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.2rem;
  font-weight: 600;
}
.footer-col li { margin-bottom: 0.6rem; }
.footer-col a {
  color: var(--text-dim);
  font-size: 0.9rem;
  transition: color var(--dur);
}
.footer-col a:hover { color: var(--gold-bright); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 1.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  color: var(--text-faint);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}
.footer-bottom .serif-en { color: var(--gold-deep); letter-spacing: 0.2em; }

/* 微信二维码卡片（黑金质感 · 页脚与关于页通用） */
.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.2rem;
}
.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem;
  background: linear-gradient(160deg, #14141C, #0E0E14);
  border: 1px solid var(--line);
  transition: border-color var(--dur), transform var(--dur), box-shadow var(--dur);
}
.qr-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(201, 169, 106, 0.08) inset;
}
.qr-frame {
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line-strong);
  background: #fff;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qr-frame img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.qr-slot {
  background: repeating-linear-gradient(45deg, #1A1A24, #1A1A24 8px, #16161E 8px, #16161E 16px);
  border-style: dashed;
  border-color: var(--line-strong);
  color: var(--text-faint);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.qr-name {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-align: center;
}
.qr-heading {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 1.4rem 0 0.2rem;
  font-weight: 600;
}
.footer-qr .qr-card { padding: 0.6rem; }
.footer-qr .qr-name { font-size: 0.7rem; }
.footer-qr .qr-frame { padding: 0.25rem; }

/* ----------------------------------------------------------------------------
 * 6. 通用组件
 * -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--line-strong);
  color: var(--gold-bright);
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: color var(--dur) var(--ease-soft), border-color var(--dur), transform var(--dur);
  cursor: pointer;
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, var(--gold), var(--amber));
  transform: translateY(101%);
  transition: transform var(--dur) var(--ease);
}
.btn span { position: relative; z-index: 1; }
.btn:hover {
  color: #14120C;
  border-color: var(--gold);
  transform: translateY(-2px);
}
.btn:hover::before { transform: translateY(0); }
.btn-solid {
  background: linear-gradient(120deg, var(--gold), var(--amber));
  color: #14120C;
  border-color: transparent;
  box-shadow: 0 8px 30px rgba(201, 169, 106, 0.18);
}
.btn-solid::before { background: linear-gradient(120deg, var(--gold-bright), var(--gold)); }
.btn-solid:hover { color: #14120C; }

/* 标签 / 徽章 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--gold-bright);
  border: 1px solid var(--line-strong);
  background: rgba(201, 169, 106, 0.06);
  text-transform: uppercase;
}

/* 金色装饰线 */
.gold-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.35;
}

/* 电影画幅（2.39:1） */
.cinema-frame {
  position: relative;
  aspect-ratio: 2.39 / 1;
  overflow: hidden;
  background: linear-gradient(135deg, #1A1A22, #0D0D12 60%, #131318);
  border: 1px solid var(--line);
}
.cinema-frame::before,
.cinema-frame::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: rgba(0, 0, 0, 0.75);
  z-index: 3;
}
.cinema-frame::before { top: 4%; }
.cinema-frame::after { bottom: 4%; }
.cinema-frame .frame-label {
  position: absolute;
  bottom: 7%;
  right: 2.5%;
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: rgba(255,255,255,0.35);
  font-family: var(--font-sans);
  z-index: 4;
}

/* 卡片 hover 光影 */
.card-hover {
  position: relative;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur), border-color var(--dur);
  border: 1px solid var(--line);
  background: var(--bg-card);
}
.card-hover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%), rgba(201,169,106,0.08), transparent 40%);
  opacity: 0;
  transition: opacity var(--dur);
  pointer-events: none;
}
.card-hover:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(201,169,106,0.06) inset;
}
.card-hover:hover::after { opacity: 1; }

/* 滚动渐入 */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  will-change: opacity, transform;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* 页面容器 */
.page {
  min-height: 100vh;
  padding-top: 7rem;
  padding-bottom: 3rem;
  animation: pageIn 0.6s var(--ease);
}
@keyframes pageIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-heading {
  padding: 2rem 0 3rem;
}
.page-heading .eyebrow { margin-bottom: 1rem; }
.page-heading h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.1;
}
.page-heading .page-sub {
  color: var(--text-dim);
  max-width: 42rem;
  margin-top: 1rem;
  font-weight: 300;
}

/* 空状态 */
.empty-state {
  text-align: center;
  color: var(--text-faint);
  padding: 4rem 1rem;
  border: 1px dashed var(--line);
}
.empty-state .big { font-size: 2rem; margin-bottom: 0.6rem; }

/* 响应式 */
@media (max-width: 920px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    width: min(78vw, 340px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 3rem 2rem;
    background: rgba(14,14,20,0.97);
    backdrop-filter: blur(24px);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease);
    gap: 0.4rem;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-link { font-size: 1.05rem; padding: 0.9rem 0; width: 100%; }
  .nav-link::after { left: 0; right: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .film-grain, * { animation-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}