/* ============================================================
   位面之网 · 复古庄重大气 · 深墨绿 × 暗金
   ============================================================ */

:root {
  --bg0: #0a1410;          /* 最深墨绿 */
  --bg1: #0e1c16;          /* 主底 */
  --bg2: #13241c;          /* 抬升底 */
  --gold: #b99855;         /* 暗金 */
  --gold-b: #d8b56c;       /* 亮金 */
  --gold-dim: #8a6f3c;     /* 哑金 */
  --ink: #e9e1cd;          /* 米白正文 */
  --ink-dim: #a89f8a;      /* 弱正文 */
  --line: rgba(185, 152, 85, .32);
  --serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --latin: 'Cormorant Garamond', var(--serif);
}

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

html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(1200px 700px at 50% -180px, rgba(185, 152, 85, .07), transparent 65%),
    linear-gradient(180deg, var(--bg1) 0%, var(--bg0) 34%, var(--bg1) 100%);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  scrollbar-gutter: stable;
}

::selection { background: rgba(185, 152, 85, .35); color: #fff; }

::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--bg0); }
::-webkit-scrollbar-thumb { background: #2a3a30; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-dim); }

img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ============================================================
   顶栏
   ============================================================ */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background .45s ease, border-color .45s ease;
  border-bottom: 1px solid transparent;
}
.topbar.scrolled {
  background: rgba(9, 16, 13, .8);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom-color: rgba(185, 152, 85, .18);
}
.topbar-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 13px 26px;
  display: flex; align-items: center; justify-content: space-between; gap: 22px;
}

/* —— 印章 logo —— */
.brand { display: flex; align-items: center; gap: 13px; }
.brand-seal, .footer-seal {
  display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr;
  place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1.5px solid var(--gold);
  color: var(--gold);
  padding: 6px 5px;                /* 圆内留白，四字收于圈中 */
  transition: transform .5s ease, box-shadow .5s ease;
}
.brand:hover .brand-seal { transform: rotate(180deg); box-shadow: 0 0 18px rgba(185,152,85,.35); }
.brand-seal i, .footer-seal i {
  font-style: normal; font-size: 10.5px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: 0;
  width: 100%; height: 100%;
}
.brand-text { font-size: 19px; letter-spacing: .28em; color: var(--ink); transition: color .3s; }
.brand:hover .brand-text { color: var(--gold-b); }

/* —— 搜索 —— */
.search { position: relative; }
.search-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--gold-dim); pointer-events: none;
  transition: color .3s;
}
#searchInput {
  width: 225px;
  padding: 9px 16px 9px 38px;
  border-radius: 999px;
  border: 1px solid rgba(185, 152, 85, .32);
  background: rgba(233, 225, 205, .05);
  color: var(--ink);
  font-family: inherit; font-size: 14px; letter-spacing: .08em;
  outline: none;
  transition: width .4s cubic-bezier(.22,.8,.3,1), border-color .3s, background .3s;
}
#searchInput::placeholder { color: rgba(168, 159, 138, .7); letter-spacing: .2em; }
#searchInput:focus { width: 320px; border-color: var(--gold); background: rgba(233,225,205,.08); }
.search:focus-within .search-icon { color: var(--gold); }

.search-results {
  position: absolute; top: calc(100% + 10px); right: 0; z-index: 60;
  min-width: 300px; max-height: 340px; overflow: auto;
  background: rgba(12, 22, 17, .96);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border: 1px solid rgba(185, 152, 85, .35);
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0,0,0,.55);
  animation: dropIn .25s ease;
}
@keyframes dropIn { from { opacity: 0; transform: translateY(-8px); } }

.search-result {
  display: flex; align-items: baseline; gap: 14px;
  padding: 12px 18px; cursor: pointer;
  border-bottom: 1px solid rgba(185,152,85,.12);
  transition: background .2s;
}
.search-result:last-child { border-bottom: none; }
.search-result:hover, .search-result.active { background: rgba(185, 152, 85, .12); }
.search-result .sr-ord { font-size: 12px; letter-spacing: .25em; color: var(--gold); white-space: nowrap; }
.search-result .sr-name { font-size: 15px; color: var(--ink); letter-spacing: .1em; }
.search-result .sr-walker { font-size: 13px; color: var(--ink-dim); letter-spacing: .15em; margin-left: auto; white-space: nowrap; }
.search-result mark { background: rgba(185,152,85,.3); color: var(--gold-b); padding: 0 2px; }
.search-empty { padding: 14px 18px; font-size: 13px; letter-spacing: .2em; color: var(--ink-dim); }

/* ============================================================
   首屏 Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero-watermark {
  position: absolute; left: 50%; top: 54%;
  transform: translate(-50%, -75%);  /* 上移四分之一个身位（自身高度的 25%） */
  width: clamp(340px, max(70vw, 65vh), 2000px);
  opacity: .09;
  user-select: none; pointer-events: none;
  filter: drop-shadow(0 0 70px rgba(185, 152, 85, .2));
}
.hero-watermark img { width: 100%; height: auto; display: block; }
.hero-inner { position: relative; z-index: 1; padding: 0 24px; transform: translateY(11vh); }
.hero-kicker {
  font-size: 15px; letter-spacing: .65em; color: var(--gold);
  margin-bottom: 34px;
}
.hero-title {
  font-size: clamp(64px, 12.5vw, 150px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--ink);                 /* 兜底：不支持渐变时显示米白 */
  width: 85vw; margin: 0 auto;       /* 四字铺满一行宽度的 85% */
  text-align: justify;               /* 字距自动均匀分布，不改变字号 */
  text-align-last: justify;          /* 单行也强制铺满，避免回退为左对齐 */
  opacity: 0; transform: translateY(.4em);
  transition: opacity 1.3s ease, transform 1.3s cubic-bezier(.19,1,.22,1);
  transition-delay: .2s;
}
.hero.rised .hero-title { opacity: 1; transform: none; }
/* 渐变鎏金文字：仅当背景裁剪文字受支持时启用，避免渲染异常 */
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero-title {
    color: transparent;
    -webkit-text-fill-color: transparent;
    background: linear-gradient(180deg, #f2e8d2 10%, #d8b56c 60%, #a98345 100%);
    -webkit-background-clip: text;
    background-clip: text;
  }
}

.hero-motto { margin-top: 38px; font-size: clamp(20px, 2.6vw, 27px); letter-spacing: .35em; color: var(--ink-dim); }
.hero-motto em { font-style: normal; color: var(--gold-b); }
.hero-motto-src { margin-top: 10px; font-size: 14px; letter-spacing: .4em; color: rgba(168,159,138,.7); }

.hero-enter {
  display: inline-block; margin-top: 54px;
  padding: 13px 44px;
  border: 1px solid var(--gold); border-radius: 999px;
  font-size: 17px; letter-spacing: .55em; text-indent: .55em;
  color: var(--gold);
  transition: background .4s, color .4s, box-shadow .4s;
}
.hero-enter:hover {
  background: var(--gold); color: var(--bg0);
  box-shadow: 0 0 34px rgba(185,152,85,.35);
}

.hero-scroll {
  position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  transition: opacity .5s ease;
}
.hero-scroll.hidden { opacity: 0; }
.hero-scroll-line {
  width: 1px; height: 58px;
  background: linear-gradient(180deg, var(--gold), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollPulse { 0%,100% { transform: scaleY(.35); opacity:.5 } 50% { transform: scaleY(1); opacity:1 } }

/* —— hero 进入动画 —— */
.hero [data-rise] {
  opacity: 0; transform: translateY(28px);
  transition: opacity 1.2s ease, transform 1.2s cubic-bezier(.19,1,.22,1);
  transition-delay: calc(var(--rise, 0) * 130ms + .15s);
}
.hero.rised [data-rise] { opacity: 1; transform: none; }

/* ============================================================
   通用区块
   ============================================================ */
.concept, .planes { position: relative; }
.concept-inner, .planes-inner { max-width: 1080px; margin: 0 auto; padding: 0 26px; }

.sec-head {
  display: flex; align-items: center; justify-content: center; gap: 26px;
  padding-top: 130px;
}
.sec-line {
  width: 64px; height: 1px; flex: none;
  background: linear-gradient(90deg, transparent, var(--gold));
}
.sec-head .sec-line:last-child { background: linear-gradient(90deg, var(--gold), transparent); }
.sec-title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600; letter-spacing: .5em; text-indent: .5em;
  color: var(--ink); white-space: nowrap;
}

/* —— 滚动显现 —— */
[data-reveal] {
  opacity: 0; transform: translateY(36px);
  transition: opacity 1.1s cubic-bezier(.22,.61,.21,1), transform 1.1s cubic-bezier(.22,.61,.21,1);
  transition-delay: var(--rd, 0s);
}
[data-reveal].revealed { opacity: 1; transform: none; }

/* ============================================================
   概念区
   ============================================================ */
.concept-quote { margin: 110px auto 0; text-align: center; }
.concept-quote-main { font-size: clamp(28px, 4vw, 40px); letter-spacing: .3em; color: var(--gold-b); }
.concept-quote-src { margin-top: 18px; font-size: 14px; letter-spacing: .4em; color: var(--ink-dim); }

.concept-paras {
  margin: 74px auto 0; max-width: 760px;
  display: flex; flex-direction: column; gap: 34px;
}
.concept-paras p {
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 2.1; letter-spacing: .06em;
  color: var(--ink-dim);
  text-align: center;
}

/* —— 关系图 —— */
.diagram { margin-top: 110px; }
.diagram-caption { text-align: center; margin-bottom: 34px; }
.diagram-title { display: block; font-size: 27px; letter-spacing: .5em; text-indent: .5em; color: var(--gold); }
.diagram-note { display: block; margin-top: 12px; font-size: 13px; letter-spacing: .18em; color: var(--ink-dim); }

.diagram-stage {
  border: 1px solid var(--line); border-radius: 16px;
  padding: 16px;
  background:
    radial-gradient(ellipse 60% 55% at 50% 50%, rgba(185,152,85,.055), transparent 72%),
    var(--bg1);
}
.diagram-stage svg { width: 100%; height: auto; display: block; }

.diag-link {
  stroke: rgba(185, 152, 85, .38); stroke-width: 1;
  fill: none;
}
.diag-node { cursor: pointer; opacity: 0; transition: opacity .9s ease; }
.diag-node circle {
  fill: var(--bg1); stroke: var(--gold); stroke-width: 1.4;
  transition: fill .3s, stroke .3s;
}
.diag-node text {
  fill: var(--ink); font-size: 16px; letter-spacing: .12em;
  font-family: var(--serif); pointer-events: none;
}
.diag-node:hover circle { fill: rgba(185,152,85,.16); stroke: var(--gold-b); }
.diag-node:hover text { fill: var(--gold-b); }

.diag-center { cursor: pointer; opacity: 0; transition: opacity 1s ease .9s; }
.diag-center circle { fill: rgba(185,152,85,.1); stroke: var(--gold); stroke-width: 2; }
.diag-center text { fill: var(--gold-b); font-size: 22px; letter-spacing: .2em; font-family: var(--serif); pointer-events: none; }
.diag-center:hover circle { fill: rgba(185,152,85,.2); }

.diagram-armed .diag-link { stroke-dashoffset: 0; transition: stroke-dashoffset 1.6s ease; }
.diagram-armed .diag-node { opacity: 1; }
.diagram-armed .diag-center { opacity: 1; }

/* ============================================================
   位面诸相
   ============================================================ */
.planes { padding-bottom: 60px; }
.planes-lead { margin: 46px auto 0; max-width: 640px; text-align: center; font-size: 15px; letter-spacing: .22em; color: var(--ink-dim); }

.planes-list { margin-top: 20px; }

.plane {
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: clamp(30px, 5.5vw, 78px);
  padding: clamp(70px, 9vw, 120px) 0;
  border-bottom: 1px solid rgba(185, 152, 85, .1);
}
.plane:last-child { border-bottom: none; }
.plane:nth-child(odd) { background: rgba(233, 225, 205, .014); }
.plane.alt .plane-media { order: 2; }
.plane.alt .plane-text { order: 1; }

/* —— 媒体区 —— */
.plane-media { position: relative; min-width: 0; }
.media-stage {
  position: relative;
  height: clamp(300px, 44vw, 470px);
  border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg0);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45);
}
.media-stage img, .media-stage video {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.6s cubic-bezier(.22,.8,.3,1), opacity .6s ease;
}
.media-stage img { transform: scale(1.04); }
/* 画卷：单击放大，不出现播放控制 */
.media-stage:has(img.media-item) .media-ctrl,
.media-stage:has(img.media-item) .media-sound { display: none; }
.media-stage:has(img.media-item) img { cursor: zoom-in; }
.media-stage.revealed img { transform: scale(1); }
.media-stage.swapping img, .media-stage.swapping video { opacity: 0; }
.media-stage video { opacity: 1; }

.media-tag {
  position: absolute; top: 14px; left: 14px; z-index: 3;
  font-size: 11px; letter-spacing: .3em; text-indent: .3em;
  color: var(--gold); padding: 4px 12px;
  border: 1px solid rgba(185,152,85,.4); border-radius: 999px;
  background: rgba(9, 16, 13, .55);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
}

.media-ctrl {
  position: absolute; inset: 0; z-index: 4;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8, 14, 11, .22);
  opacity: 0; transition: opacity .35s;
}
.media-stage:hover .media-ctrl { opacity: 1; }
.media-ctrl.show { opacity: 1; }
.media-ctrl-btn {
  width: 62px; height: 62px; border-radius: 50%;
  border: 1px solid var(--gold); background: rgba(9,16,13,.55);
  color: var(--gold-b); font-size: 19px;
  display: flex; align-items: center; justify-content: center;
  transition: background .3s, transform .3s;
}
.media-ctrl-btn:hover { background: var(--gold); color: var(--bg0); transform: scale(1.06); }

.media-sound {
  position: absolute; right: 14px; bottom: 14px; z-index: 4;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid rgba(185,152,85,.4); background: rgba(9,16,13,.6);
  color: var(--gold); font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: background .3s;
}
.media-sound:hover { background: var(--gold); color: var(--bg0); }
.media-sound svg { width: 16px; height: 16px; display: block; }

.media-thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 15px; }
.media-thumb {
  position: relative; width: 66px; height: 66px; flex: none;
  border-radius: 9px; overflow: hidden;
  border: 1px solid rgba(185,152,85,.3);
  background: var(--bg0); cursor: pointer;
  opacity: .5; transition: opacity .3s, border-color .3s, box-shadow .3s;
  padding: 0;
}
.media-thumb img { width: 100%; height: 100%; object-fit: cover; }
.media-thumb:hover { opacity: .85; }
.media-thumb.active {
  opacity: 1; border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), 0 0 16px rgba(185,152,85,.25);
}
.media-thumb.video-thumb { display: flex; align-items: center; justify-content: center; }
.media-thumb.video-thumb::after {
  content: '▶'; position: absolute;
  font-size: 13px; color: var(--gold-b);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  text-shadow: 0 1px 6px rgba(0,0,0,.8);
}
.thumb-label {
  position: absolute; left: 0; right: 0; bottom: 0;
  font-size: 9.5px; letter-spacing: .08em; text-align: center;
  color: var(--ink); padding: 2px 2px 3px;
  background: linear-gradient(transparent, rgba(8,13,10,.85));
  overflow: hidden; white-space: nowrap;
}
.video-thumb .thumb-label { position: static; background: none; font-size: 10.5px; letter-spacing: .12em; color: var(--ink-dim); }

/* —— 文字区 —— */
.plane-ord { font-size: 13px; letter-spacing: .5em; color: var(--gold); margin-bottom: 20px; }
.plane-name { font-size: clamp(32px, 4vw, 46px); font-weight: 600; letter-spacing: .1em; color: var(--ink); }
.plane-walker { margin-top: 10px; font-size: 19px; letter-spacing: .3em; color: var(--gold-b); }
.plane-walker::before { content: '位面行者 · '; font-size: 13.5px; letter-spacing: .25em; color: var(--gold-dim); }
.plane-copy {
  margin-top: 30px; max-width: 500px;
  font-size: 17px; line-height: 2.05; letter-spacing: .05em;
  color: var(--ink-dim);
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  position: relative;
  border-top: 1px solid rgba(185, 152, 85, .14);
  padding: 86px 24px 70px;
  text-align: center;
  background: radial-gradient(600px 300px at 50% 0%, rgba(185,152,85,.05), transparent 70%);
}
.footer-seal { width: 62px; height: 62px; margin: 0 auto 26px; border-width: 1.5px; padding: 15px 8px; }
.footer-seal i { font-size: 16px; }
.footer-name { font-size: 25px; letter-spacing: .35em; color: var(--gold); }
.footer-note { margin-top: 14px; font-size: 13px; letter-spacing: .4em; color: var(--ink-dim); }
.footer-motto { margin-top: 26px; font-size: 15px; letter-spacing: .25em; color: rgba(168,159,138,.6); }
.footer-tip {
  position: absolute; right: 28px; bottom: 22px;
  font-size: 13px; letter-spacing: .25em;   /* 参照上一行「认识你自己」的字样 */
  color: rgba(168,159,138,.45);
}

/* ============================================================
   大图悬空层
   ============================================================ */
.lightbox { position: fixed; inset: 0; z-index: 120; display: flex; align-items: center; justify-content: center; padding: 20px; }
.lightbox[hidden] { display: none; }
.lightbox-mask {
  position: absolute; inset: 0;
  background: rgba(4, 8, 6, .9);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  opacity: 0; transition: opacity .4s;
}
.lightbox.open .lightbox-mask { opacity: 1; }
.lightbox-stage {
  position: relative; z-index: 1;
  max-width: 92vw; max-height: 88vh;
  margin: 0; padding: 0;
  display: flex; flex-direction: column; align-items: center;
  opacity: 0; transform: scale(.95);
  transition: opacity .45s cubic-bezier(.22,.8,.3,1), transform .45s cubic-bezier(.22,.8,.3,1);
}
.lightbox.open .lightbox-stage { opacity: 1; transform: none; }
.lightbox-stage img {
  max-width: 92vw; max-height: 84vh;
  object-fit: contain;
  border: 1px solid rgba(185, 152, 85, .35);
  border-radius: 10px;
  box-shadow: 0 40px 140px rgba(0,0,0,.7);
  background: #05080a;
}
.lightbox-stage figcaption {
  margin-top: 16px;
  font-size: 14px; letter-spacing: .3em; text-indent: .3em;
  color: var(--ink-dim);
}
.lightbox-close {
  position: absolute; top: 22px; right: 26px; z-index: 2;
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid rgba(185,152,85,.45); background: rgba(9,16,13,.6);
  color: var(--gold); font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  transition: background .3s, transform .3s;
  opacity: 0; transform: translateY(-6px);
  transition-delay: .1s;
}
.lightbox.open .lightbox-close { opacity: 1; transform: none; }
.lightbox-close:hover { background: var(--gold); color: var(--bg0); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 920px) {
  .plane { grid-template-columns: 1fr; gap: 34px; }
  .plane.alt .plane-media { order: 0; }
  .plane.alt .plane-text { order: 1; }
  .media-stage { height: min(64vw, 430px); }
  #searchInput { width: 150px; }
  #searchInput:focus { width: 210px; }
  .search-results { right: auto; left: 0; min-width: min(84vw, 320px); }
  .sec-head { padding-top: 90px; }
}

@media (max-width: 520px) {
  .media-stage { height: 62vw; }
  .brand-text { display: none; }
  .hero-enter { margin-top: 40px; }
  .hero-scroll { bottom: 24px; }
  .sec-line { width: 30px; }
  .hero-title { width: 92vw; }  /* 窄屏兜底：避免四字挤过容器 */
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-reveal], [data-rise], .hero-title, .diag-node, .diag-center {
    opacity: 1 !important; transform: none !important;
  }
}