/* ===== FutureCine · 极简现代风（淡咖啡 + 黑字） ===== */
:root {
  --bg: #F5EFE4;        /* 淡咖啡 · 全站统一底色 */
  --bg-alt: #EDE1CD;    /* 淡咖啡 · 深一档，只用于缩略图位等小控件 */
  --ink: #111111;       /* 主文字 */
  --ink-2: #6B5F51;     /* 次要文字（暖褐灰） */
  --ink-3: #8C7C66;     /* 弱化文字（暖褐灰） */
  --line: #DFCFB8;      /* 细分隔线（比底色深一档） */
  --accent: #8C4A25;    /* 提示用深赭（咖啡底上仍需醒目） */
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.72;
}
a { color: inherit; }

/* 顶部导航（毛玻璃暖白） */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: 56px; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 28px;
  background: rgba(245,239,228,0.82);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.nav .logo { font-weight: 500; font-size: 17px; letter-spacing: 0.02em; }
.nav .logo a { text-decoration: none; color: var(--ink); }
.nav ul { display: flex; gap: 30px; list-style: none; }
.nav-center { margin: 0 auto; }
.nav a { color: var(--ink); text-decoration: none; opacity: 0.6; transition: opacity .25s ease; letter-spacing: .01em; }
.nav a:hover { opacity: 1; }
.nav-right { gap: 20px; }
.nav-center a { position: relative; }
.nav a.on { opacity: 1; }
.nav-center a.on::after {
  content: ''; position: absolute; left: 50%; bottom: -9px;
  transform: translateX(-50%);
  width: 3px; height: 3px; border-radius: 50%; background: var(--ink);
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; margin-left: 6px; }
.nav-toggle span { display: block; width: 20px; height: 1.5px; background: var(--ink); margin: 5px 0; transition: .25s; }
.nav.open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* 英雄区：暖白底、黑字、大留白 */
.hero {
  background: var(--bg); color: var(--ink);
  padding: 172px 24px 108px; text-align: center;
  border-bottom: 1px solid var(--line);
}
.hero .eyebrow {
  font-size: 11px; font-weight: 500; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 28px;
}
.hero h1 { font-size: clamp(38px, 6.6vw, 74px); font-weight: 500; letter-spacing: -0.025em; line-height: 1.08; }
.hero .sub {
  font-size: clamp(15px, 1.9vw, 19px); font-weight: 400; margin: 28px auto 0;
  color: var(--ink-2); line-height: 1.75; max-width: 620px;
}

/* 内容区：大留白 */
.section { padding: 124px 24px; max-width: 1120px; margin: 0 auto; position: relative; }
/* 底色全站统一后，区块之间改用一条细线分隔（不再用色块分区） */
.section.light { border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(26px, 3.8vw, 42px); font-weight: 500; letter-spacing: -0.02em; text-align: center; line-height: 1.22; }
.section .lead { text-align: center; color: var(--ink-2); font-size: 16px; margin: 20px auto 0; max-width: 640px; line-height: 1.78; }

/* 按钮：黑色实心，悬停反白 */
.cta {
  display: inline-block; margin-top: 42px;
  background: var(--ink); color: #fff; padding: 15px 40px;
  border: 1px solid var(--ink); border-radius: 6px;
  font-size: 15px; letter-spacing: .02em; text-decoration: none; cursor: pointer;
  transition: background .25s ease, color .25s ease;
}
.cta:hover { background: transparent; color: var(--ink); }
.cta.ghost { background: transparent; color: var(--ink); }
.cta.ghost:hover { background: var(--ink); color: #fff; }

/* 卡片：细线框，不用阴影 */
.card {
  background: transparent; border: 1px solid var(--line); border-radius: 8px;
  padding: 40px 34px;
  transition: border-color .3s ease;
}
.card:hover { border-color: var(--ink); }
.card h3 { font-size: 17px; font-weight: 500; margin-bottom: 12px; letter-spacing: -0.01em; }
.card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.78; }
.grid { display: grid; gap: 24px; margin-top: 56px; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }

/* 渐显动画 */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .85s ease, transform .85s cubic-bezier(.16,.84,.32,1); }
.reveal.in { opacity: 1; transform: none; }

/* 表单 */
.panel {
  max-width: 440px; margin: 0 auto; background: #FBF6EE;
  border: 1px solid var(--line); border-radius: 10px; padding: 44px 38px;
}
.tabs { display: flex; margin-bottom: 28px; border: 1px solid var(--line); border-radius: 8px; padding: 4px; }
.tabs button {
  flex: 1; border: none; background: transparent; padding: 10px; font-size: 14px;
  cursor: pointer; border-radius: 6px; color: var(--ink); font-weight: 500;
  transition: background .25s ease;
}
.tabs button.on { background: var(--bg-alt); }
.field { margin-bottom: 18px; text-align: left; }
.field label {
  display: block; font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 9px;
}
.field input {
  width: 100%; padding: 13px 15px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 6px; background: #FCF8F1;
  outline: none; transition: border-color .25s ease;
}
.field input:focus { border-color: var(--ink); }
.panel .cta { width: 100%; margin-top: 12px; text-align: center; }
.hint { font-size: 13px; color: var(--ink-2); text-align: center; margin-top: 18px; }

/* 视频作品墙 */
.videos-head { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.videos-head h2 { text-align: left; }
.videos-head span { color: var(--ink-2); font-size: 13.5px; }
.vgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.vcard {
  background: transparent; border: 1px solid var(--line); border-radius: 10px;
  overflow: hidden; cursor: pointer;
  transition: border-color .3s ease, transform .3s ease;
}
.vcard:hover { border-color: var(--ink); transform: translateY(-2px); }
.vthumb {
  aspect-ratio: 16 / 9; background: var(--bg-alt);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-3); font-size: 13px;
}
.vmeta { padding: 16px 18px 18px; }
.vmeta .vt { font-size: 15px; font-weight: 500; }
.vmeta .vs { font-size: 12.5px; color: var(--ink-2); margin-top: 6px; }

/* 模态 */
.modal {
  position: fixed; inset: 0; background: rgba(17,17,17,0.55); z-index: 500;
  display: none; align-items: center; justify-content: center; padding: 22px;
}
.modal.open { display: flex; }
.modal .box { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; max-width: 880px; width: 100%; overflow: hidden; }
.modal .player {
  aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center;
  background: #111; color: var(--ink-3); font-size: 15px;
}
.modal .body { padding: 24px 28px; }
.modal .body h3 { font-size: 18px; margin-bottom: 6px; font-weight: 500; }
.modal .body p { font-size: 13.5px; color: var(--ink-2); }
.modal .close {
  float: right; background: transparent; border: 1px solid var(--line);
  border-radius: 50%; width: 34px; height: 34px; font-size: 17px;
  cursor: pointer; color: var(--ink);
}

/* 页脚 */
footer {
  background: var(--bg); border-top: 1px solid var(--line);
  color: var(--ink-2); font-size: 12.5px;
  text-align: center; padding: 58px 24px 50px; line-height: 2;
}
footer .warn { color: var(--accent); }
footer .icp { display: inline-block; margin-top: 4px; color: var(--ink-3); font-size: 12px; letter-spacing: .02em; }
footer .icp:hover { color: var(--ink-2); }
footer a { color: var(--ink-2); text-decoration: none; }
footer a:hover { color: var(--ink); }
.footer-links { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; margin-bottom: 16px; }
.footer-links a { letter-spacing: .02em; }

/* 平板 */
@media (min-width: 735px) and (max-width: 1068px) {
  .grid.c3 { grid-template-columns: repeat(2, 1fr); }
  .vgrid { grid-template-columns: repeat(2, 1fr); }
}

/* 手机 */
@media (max-width: 734px) {
  .nav { padding: 0 18px; }
  .nav-toggle { display: block; }
  .nav-center, .nav-right {
    display: none;
    position: absolute; top: 56px; left: 0; right: 0;
    flex-direction: column; gap: 0; align-items: stretch;
    background: rgba(245,239,228,0.98);
    backdrop-filter: saturate(160%) blur(18px);
    -webkit-backdrop-filter: saturate(160%) blur(18px);
    border-bottom: 1px solid var(--line);
    padding: 6px 0;
  }
  .nav.open .nav-center, .nav.open .nav-right { display: flex; }
  .nav-center { margin: 0; }
  .nav-center li, .nav-right li { padding: 14px 24px; }
  .nav-right { border-top: 1px solid var(--line); }
  .nav a { opacity: 1; }
  .nav-center a.on::after { display: none; }
  .grid.c3, .grid.c2, .vgrid { grid-template-columns: 1fr; }
  .section { padding: 88px 20px; }
  .hero { padding: 132px 20px 80px; }
  .cta { padding: 14px 32px; }
}