/* =========================================================
   和鸣辩论社 · 招新站
   三界面：突围 / 和鸣 / 加入
   视觉语言：藏蓝卷宗 × 声场 × 朱砂印
   ========================================================= */

/* ---------- 字体 ---------- */
@font-face {
  font-family: "Noto Serif SC";
  src: url("../fonts/noto-serif-sc-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Serif SC";
  src: url("../fonts/noto-serif-sc-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("../fonts/noto-sans-sc-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("../fonts/noto-sans-sc-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 砺、镝：GB2312 一级字库未收，用原文子集补两字 */
@font-face {
  font-family: "Noto Serif SC Rare";
  src: url("../fonts/rare-serif-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+783A, U+955D;
}
@font-face {
  font-family: "Noto Serif SC Rare";
  src: url("../fonts/rare-serif-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+783A, U+955D;
}
@font-face {
  font-family: "Noto Sans SC Rare";
  src: url("../fonts/rare-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+783A, U+955D;
}
@font-face {
  font-family: "Noto Sans SC Rare";
  src: url("../fonts/rare-sans-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+783A, U+955D;
}

/* ---------- 变量 ---------- */
:root {
  --ink: #0b1a2e;
  --ink-deep: #060f1c;
  --ink-soft: #0e2138;
  --paper: #f2ebdd;
  --paper-2: #e8decc;
  --paper-3: #faf5ea;
  --gold: #c9a45c;
  --gold-2: #e2c88e;
  --gold-deep: #7a5a1e;
  --seal: #b23a2e;
  --teal: #215a64;
  --teal-deep: #1b4d56;
  --teal-light: #8fd3dd;
  --teal-glow: rgba(95, 179, 192, 0.16);

  --dark-text: #ede6d7;
  --dark-muted: rgba(237, 230, 215, 0.6);
  --paper-text: #12233a;
  --paper-muted: rgba(18, 35, 58, 0.64);
  --line-dark: rgba(201, 164, 92, 0.22);
  --line-paper: rgba(18, 35, 58, 0.14);

  --serif: "Noto Serif SC", "Noto Serif SC Rare", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "Noto Sans SC Rare", "PingFang SC", "Microsoft YaHei", sans-serif;

  --pad: clamp(20px, 6.1vw, 26px);
  --topbar: 54px;
  --ease: cubic-bezier(0.19, 1, 0.22, 1);
}

/* file:// 直开时浏览器会拦截本地字体，此处主动回退到系统宋体/黑体 */
.no-webfont {
  --serif: "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ---------- 基础 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  background: #040a12;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0 auto;
  max-width: 430px;
  min-height: 100svh;
  background: var(--ink-deep);
  color: var(--paper-text);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.95;
  overflow-x: hidden;
  box-shadow: 0 0 90px rgba(0, 0, 0, 0.55);
}

/* 纸面颗粒 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 120;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  background-size: 140px 140px;
}

img { max-width: 100%; }
p { margin: 0; }
h1, h2, h3, blockquote, figure, ol, ul { margin: 0; }
a { color: inherit; }
::selection { background: var(--gold); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 顶栏 ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: 2px;
  z-index: 130;
  pointer-events: none;
}
.progress i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold), var(--gold-2));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.08s linear;
}

.topbar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: calc(var(--topbar) + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) var(--pad) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 110;
  border-bottom: 1px solid transparent;
  transition: background 0.45s ease, border-color 0.45s ease, backdrop-filter 0.45s ease;
  view-transition-name: none;
}
.topbar.is-scrolled {
  background: rgba(6, 15, 28, 0.74);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
  border-bottom-color: var(--line-dark);
}
.page--paper .topbar.is-scrolled {
  background: rgba(242, 235, 221, 0.84);
  border-bottom-color: var(--line-paper);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--paper);
}
.brand img { width: 24px; height: 24px; }
.page--paper .brand { color: var(--ink); }

.nav {
  display: flex;
  align-items: center;
  gap: 17px;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.14em;
}
.nav a {
  text-decoration: none;
  color: var(--dark-muted);
  transition: color 0.3s ease;
}
.page--paper .nav a { color: var(--paper-muted); }
.nav a[aria-current="page"] { color: var(--gold-2); }
.page--paper .nav a[aria-current="page"] { color: var(--gold-deep); }
.nav a[aria-current="page"]::after {
  content: "";
  display: block;
  width: 4px;
  height: 4px;
  margin: 4px auto 0;
  border-radius: 50%;
  background: var(--teal-light);
}
.page--paper .nav a[aria-current="page"]::after { background: var(--teal); }
.nav .nav-cta {
  color: var(--gold-2);
  border: 1px solid rgba(201, 164, 92, 0.55);
  padding: 4px 10px;
  line-height: 1.5;
}
.page--paper .nav .nav-cta { color: var(--gold-deep); border-color: rgba(140, 107, 42, 0.5); }
.nav .nav-cta[aria-current="page"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}
.nav .nav-cta[aria-current="page"]::after { display: none; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: calc(var(--topbar) + env(safe-area-inset-top) + 20px) var(--pad) calc(26px + env(safe-area-inset-bottom));
  overflow: hidden;
  background: var(--ink-deep);
  isolation: isolate;
}
.hero-inner {
  position: relative;
  z-index: 3;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}
.hero-head { display: flex; align-items: center; gap: 12px; }
.emblem {
  width: 46px;
  height: 46px;
  flex: none;
  filter: drop-shadow(0 0 16px rgba(201, 164, 92, 0.16));
}
.hero-head-text { display: flex; flex-direction: column; gap: 2px; }

.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  line-height: 1.8;
  letter-spacing: 0.22em;
  color: var(--gold-2);
}
.eyebrow--dim { color: var(--dark-muted); letter-spacing: 0.4em; }

.hero-main { padding-top: 8vh; }
.hero-title {
  display: flex;
  font-size: clamp(64px, 19vw, 82px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.02em;
  color: var(--paper);
  overflow: hidden;
  padding-bottom: 0.04em;
}
.hero-title .ch {
  display: block;
  transform: translateY(112%);
  animation: charUp 1.05s var(--ease) 0.15s forwards;
}
.hero-title .ch:nth-child(2) { animation-delay: 0.27s; }

.display-title {
  display: flex;
  font-size: clamp(62px, 18.5vw, 80px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.03em;
  overflow: hidden;
  padding-bottom: 0.05em;
}
.display-title .ch {
  display: block;
  transform: translateY(112%);
  animation: charUp 1.05s var(--ease) 0.15s forwards;
}
.display-title .ch:nth-child(2) { animation-delay: 0.27s; }

.hero-lead {
  margin-top: 22px;
  max-width: 20em;
  font-size: 16.5px;
  line-height: 1.92;
  color: rgba(242, 235, 221, 0.82);
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(201, 164, 92, 0.45);
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold-2);
  text-decoration: none;
}
.hero-cta span { transition: transform 0.3s ease; }
.hero-cta:active span { transform: translateX(4px); }

.hero-foot { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.hero-meta {
  font-family: var(--sans);
  font-size: 11px;
  line-height: 2;
  letter-spacing: 0.14em;
  color: var(--dark-muted);
}
.scroll-cue {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-family: var(--sans);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--gold-2);
}
.scroll-cue i {
  position: relative;
  display: block;
  width: 1px;
  height: 42px;
  overflow: hidden;
  background: linear-gradient(to bottom, rgba(201, 164, 92, 0.5), transparent);
}
.scroll-cue i::after {
  content: "";
  position: absolute;
  left: 0;
  top: -100%;
  width: 1px;
  height: 100%;
  background: var(--gold-2);
  animation: cue 2.4s ease-in-out infinite;
}

/* 首屏：中性声场 */
.hero--index {
  background:
    radial-gradient(120% 80% at 50% 0%, #10253f 0%, #081525 55%, #050c16 100%);
}
.hero-field { position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.hero-field::before {
  content: "";
  position: absolute;
  inset: -18%;
  background: repeating-radial-gradient(circle at 82% 39%, transparent 0 46px, rgba(95, 179, 192, 0.14) 46px 47px);
  -webkit-mask-image: radial-gradient(52% 44% at 82% 39%, #000 8%, transparent 72%);
  mask-image: radial-gradient(52% 44% at 82% 39%, #000 8%, transparent 72%);
  animation: breathe 14s ease-in-out infinite;
}
.hero-field::after {
  content: "";
  position: absolute;
  top: -8%;
  right: -24%;
  width: 76%;
  height: 48%;
  background: radial-gradient(50% 50% at 50% 50%, var(--teal-glow), transparent 70%);
}
.ghost-emblem {
  position: absolute;
  right: -96px;
  top: 20%;
  width: 320px;
  height: auto;
  opacity: 0.04;
  filter: brightness(0) invert(1);
}

/* 裁切角标 */
.frame {
  position: absolute;
  inset: 12px;
  z-index: 2;
  border: 1px solid rgba(201, 164, 92, 0.2);
  pointer-events: none;
}
.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1px solid rgba(201, 164, 92, 0.6);
}
.frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.frame::after { right: -1px; bottom: -1px; border-left: 0; border-top: 0; }

/* 和鸣首屏（纸面 + 声波环） */
.hero--about {
  background: var(--paper);
  color: var(--ink);
  min-height: 84vh;
  min-height: 84svh;
}
.hero--about .eyebrow { color: var(--gold-deep); }
.hero--about .hero-lead { color: var(--paper-muted); font-size: 16px; }
.hero--about .hero-meta { color: var(--paper-muted); }
.hero--about .display-title { color: var(--ink); }
.echo {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: repeating-radial-gradient(circle at 50% 34%, transparent 0 33px, rgba(44, 111, 123, 0.18) 33px 34px);
  -webkit-mask-image: radial-gradient(72% 56% at 50% 34%, #000 18%, transparent 74%);
  mask-image: radial-gradient(72% 56% at 50% 34%, #000 18%, transparent 74%);
  animation: breathe 10s ease-in-out infinite;
}

/* 加入首屏（聚光灯） */
.hero--join {
  color: var(--paper);
  min-height: 86vh;
  min-height: 86svh;
  background:
    radial-gradient(120% 72% at 50% 0%, #102b45 0%, #081525 48%, #050c16 100%);
}
.spot { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.spot::before {
  content: "";
  position: absolute;
  top: -14%;
  left: 50%;
  width: 78%;
  height: 88%;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, rgba(143, 211, 221, 0.16), rgba(143, 211, 221, 0) 78%);
  clip-path: polygon(41% 0, 59% 0, 100% 100%, 0 100%);
  filter: blur(16px);
}
.spot::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 44%;
  height: 34%;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 50%, rgba(143, 211, 221, 0.2), transparent 70%);
}
.hero-quote {
  margin-top: 26px;
  padding-left: 16px;
  border-left: 1px solid rgba(201, 164, 92, 0.55);
  font-size: 16.5px;
  line-height: 2;
  color: rgba(242, 235, 221, 0.8);
}

/* ---------- 通用区块 ---------- */
.sec {
  position: relative;
  padding: clamp(62px, 16.5vw, 84px) var(--pad);
}
.sec--ink { background: var(--ink-deep); color: var(--dark-text); }
.sec--paper { background: var(--paper); color: var(--paper-text); }
.sec--paper2 { background: var(--paper-2); color: var(--paper-text); }
.sec--tight { padding-top: 44px; padding-bottom: 44px; }
.wrap { width: 100%; }

.sec-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 30px;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.28em;
  color: var(--gold-deep);
}
.sec--ink .sec-mark { color: var(--gold); }
.sec-mark::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.26;
}
.sec-mark--center { justify-content: center; }
.sec-mark--center::before {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}
.sec-mark--center::after { flex: none; width: 20px; opacity: 0.35; }
.sec-num {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid currentColor;
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  opacity: 0.95;
}
.sec--ink .sec-num { color: var(--teal-light); }

.lead { font-size: 16.5px; line-height: 2; opacity: 0.88; }
.lead--center { margin-top: 40px; text-align: center; font-size: 17px; }
.nowrap { white-space: nowrap; }

.display-quote {
  font-size: clamp(23px, 6.3vw, 26px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--paper);
}
.strike { position: relative; white-space: nowrap; }
.strike::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  top: 54%;
  height: 1.5px;
  background: var(--seal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.65s var(--ease) 0.45s;
}
.strike-block.is-in .strike::after { transform: scaleX(1); }
.strike-block.is-in .strike { color: rgba(237, 230, 215, 0.42); transition: color 0.6s ease 0.45s; }

.cascade p { margin-top: 14px; font-size: 17px; line-height: 2.05; }

/* 勇气 */
.turn-title {
  margin-bottom: 32px;
  font-size: clamp(27px, 7vw, 30px);
  line-height: 1.65;
  letter-spacing: 0.01em;
}
.turn-title em {
  position: relative;
  font-style: normal;
  color: var(--seal);
  z-index: 0;
}
.turn-title em::after {
  content: "";
  position: absolute;
  left: -0.04em;
  right: -0.04em;
  bottom: 0.08em;
  height: 0.34em;
  background: rgba(201, 164, 92, 0.34);
  z-index: -1;
}
.triad p {
  position: relative;
  margin-top: 16px;
  padding-left: 18px;
  font-size: 16.5px;
  line-height: 1.95;
  text-wrap: balance;
}
.triad p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.86em;
  width: 8px;
  height: 1px;
  background: var(--teal);
  opacity: 0.8;
}
.triad p:nth-child(2) { margin-left: 14px; }
.triad p:nth-child(3) { margin-left: 28px; }

/* 沉默 */
.whisper p {
  margin-top: 14px;
  font-size: 15.5px;
  line-height: 2.1;
  color: var(--dark-muted);
}
.whisper .whisper-lead { color: var(--dark-text); }
.silence-title {
  margin-top: 42px;
  font-size: clamp(27px, 7.2vw, 31px);
  line-height: 1.7;
  color: var(--paper);
}
.silence-title::before {
  content: "";
  display: block;
  width: 1px;
  height: 38px;
  margin-bottom: 22px;
  background: linear-gradient(var(--seal), transparent);
}

/* 契机 */
.chance p { margin-top: 10px; font-size: 18px; line-height: 2; }
.chance-em { color: var(--seal); font-weight: 700; }

/* 场花 */
.changhua-frame {
  position: relative;
  padding: 34px 12px 24px;
  border: 1px solid var(--line-paper);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0));
}
.changhua-frame::before,
.changhua-frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid rgba(140, 107, 42, 0.5);
}
.changhua-frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.changhua-frame::after { right: -1px; bottom: -1px; border-left: 0; border-top: 0; }

.couplet {
  display: flex;
  flex-direction: row-reverse;
  justify-content: center;
  align-items: center;
  gap: clamp(14px, 5vw, 24px);
  min-height: 400px;
}
.col {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: clamp(15px, 4.1vw, 17px);
  letter-spacing: 0.3em;
  line-height: 1.2;
  color: var(--ink);
}
.js .changhua-frame .col { clip-path: inset(0 0 100% 0); }
.changhua-frame.is-in .col {
  clip-path: inset(0 0 0 0);
  transition: clip-path 1.1s var(--ease);
}
.changhua-frame.is-in .col:nth-child(2) { transition-delay: 0.12s; }
.changhua-frame.is-in .col:nth-child(3) { transition-delay: 0.24s; }
.changhua-frame.is-in .col:nth-child(4) { transition-delay: 0.36s; }

.seal-img {
  display: block;
  width: 76px;
  height: auto;
  margin: 6px auto 0;
  opacity: 0.9;
  mix-blend-mode: multiply;
}

.motto-wrap { margin-top: 44px; text-align: center; }
.motto-stamp {
  display: inline-block;
  padding: 10px 16px 9px;
  border: 1.5px solid var(--seal);
  color: var(--seal);
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: 0.18em;
  box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 4px rgba(178, 58, 46, 0.5);
}
.motto-stamp.is-in { animation: stamp 0.65s cubic-bezier(0.2, 1.3, 0.4, 1) both; }

/* 引言 / CTA */
.quote {
  padding-left: 20px;
  border-left: 1px solid rgba(201, 164, 92, 0.5);
  font-size: clamp(19px, 5.2vw, 22px);
  line-height: 1.95;
  color: var(--paper);
}
.quote--xl { font-size: clamp(21px, 5.8vw, 24px); line-height: 1.9; }
.sec--cta { padding-bottom: 78px; }
.cta-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 36px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 0 24px;
  border: 1px solid transparent;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
  transition: transform 0.25s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
.btn:active { transform: scale(0.985); }
.btn .arrow { font-size: 17px; transition: transform 0.3s ease; }
.btn:active .arrow { transform: translateX(4px); }
.btn--primary {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #d9b96f, #c9a45c);
  color: #0a1728;
  box-shadow: 0 14px 34px rgba(201, 164, 92, 0.16);
}
.btn--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 28%, rgba(255, 255, 255, 0.38) 50%, transparent 72%);
  transform: translateX(-130%);
  transition: transform 0.75s ease;
}
.btn--primary:active::after { transform: translateX(130%); }
.btn--ghost { border-color: rgba(18, 35, 58, 0.28); color: var(--ink); }
.btn--ghostDark { border-color: rgba(237, 230, 215, 0.28); color: var(--paper); }

/* ---------- 和鸣页 ---------- */
.photo-band {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--ink-deep);
}
.photo-band img {
  display: block;
  width: 100%;
  height: auto;
  filter: grayscale(1) contrast(1.04) brightness(0.94);
  transition: filter 1.2s ease, transform 1.2s var(--ease);
}
.photo-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: #0b1a2e;
  mix-blend-mode: color;
  opacity: 0.9;
  transition: opacity 1.2s ease;
  pointer-events: none;
}
.photo-band.is-in img { filter: grayscale(0) contrast(1) brightness(1); transform: scale(1.005); }
.photo-band.is-in::after { opacity: 0; }
.photo-band figcaption {
  position: absolute;
  left: var(--pad);
  bottom: 14px;
  z-index: 2;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: rgba(242, 235, 221, 0.82);
}
.photo-band--narrow { margin: 0 calc(var(--pad) * -1); }

/* 合照：羽化过渡 */
.photo-feather {
  position: relative;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: var(--paper);
}
.photo-feather img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.92) contrast(1.03) brightness(0.92);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 11%, #000 80%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 11%, #000 80%, transparent 100%);
  transition: transform 1.4s var(--ease), filter 1.2s ease;
}
.photo-feather.is-in img { transform: scale(1.015); filter: saturate(1) contrast(1.02) brightness(1); }
.photo-feather figcaption {
  position: absolute;
  right: var(--pad);
  bottom: 34px;
  z-index: 2;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: rgba(242, 235, 221, 0.82);
  text-shadow: 0 1px 10px rgba(6, 15, 28, 0.75);
}

.duo { display: flex; flex-direction: column; gap: 26px; }
.duo-item { padding-left: 16px; border-left: 1px solid var(--line-paper); }
.duo-item .sec-mark { margin-bottom: 10px; }
.duo-item p:not(.sec-mark):not(.duo-quote) {
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--paper-muted);
}
.duo-quote {
  margin-top: 12px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
}

.sec--structure { padding-top: 26px; }
.team-list { display: flex; flex-direction: column; gap: 18px; margin-top: 40px; }
.team-card {
  position: relative;
  padding: 24px 22px 20px;
  border: 1px solid var(--line-paper);
  background: rgba(255, 255, 255, 0.42);
}
.team-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--gold);
}
.team-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.team-num {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--teal);
}
.team-head h2 { font-size: 24px; letter-spacing: 0.06em; }
.label {
  margin-bottom: 8px;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  color: var(--paper-muted);
}
.team-card p:not(.label) { font-size: 15px; line-height: 1.98; }
.team-card p + p { margin-top: 12px; }
.team-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(140, 107, 42, 0.35);
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  text-decoration: none;
}
.team-link span { transition: transform 0.3s ease; }
.team-link:active span { transform: translateX(4px); }

/* 指导老师 */
.advisor {
  padding: 26px 0;
  border-top: 1px solid var(--line-paper);
}
.advisor:last-child { border-bottom: 1px solid var(--line-paper); }
.advisor-head {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
}
.advisor-photo {
  position: relative;
  width: 96px;
  flex: none;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--ink);
}
.advisor-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.06);
  transition: filter 1.2s ease;
}
.advisor-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: #0b1a2e;
  mix-blend-mode: color;
  opacity: 0.85;
  transition: opacity 1.2s ease;
}
.advisor-photo::before {
  content: "";
  position: absolute;
  inset: 6px;
  z-index: 2;
  border: 1px solid rgba(201, 164, 92, 0.5);
  pointer-events: none;
}
.advisor.is-in .advisor-photo img { filter: grayscale(0) contrast(1); }
.advisor.is-in .advisor-photo::after { opacity: 0; }
.advisor-head h2 { margin-bottom: 4px; font-size: 22px; letter-spacing: 0.05em; }
.cred-list { list-style: none; margin: 0; padding: 0; }
.cred-list li {
  position: relative;
  padding: 8px 0 8px 14px;
  border-bottom: 1px solid rgba(18, 35, 58, 0.08);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--paper-muted);
  text-wrap: balance;
}
.cred-list li:last-child { border-bottom: 0; }
.cred-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1em;
  width: 5px;
  height: 1px;
  background: var(--gold);
}

/* 活动一览 */
.schedule {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
}
.schedule::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: rgba(201, 164, 92, 0.22);
}
.schedule::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-2), var(--gold));
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
}
.schedule li {
  position: relative;
  padding: 20px 0;
  border-bottom: 1px solid rgba(237, 230, 215, 0.1);
}
.schedule li:last-child { border-bottom: 0; }
.schedule li::before {
  content: "";
  position: absolute;
  left: -28px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--teal-light);
  border-radius: 50%;
  background: var(--ink-deep);
}
.schedule li::before { top: 27px; }
.sched-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.sched-month {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--teal-light);
}
.sched-idx {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: rgba(237, 230, 215, 0.38);
}
.schedule p { font-size: 15.2px; line-height: 1.95; color: rgba(237, 230, 215, 0.9); }

/* 荣誉 */
.sec--honors { overflow: hidden; }
.honors-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin: 4px 0 24px;
}
.honors-head .sec-mark { flex: 1; margin-bottom: 0; }
.seal-stamp {
  width: 72px;
  height: auto;
  margin-top: -4px;
  mix-blend-mode: multiply;
  transform: scale(1.6);
  opacity: 0;
}
.seal-stamp.is-in { animation: stampSeal 0.72s cubic-bezier(0.2, 1.25, 0.4, 1) 0.15s both; }
.honors { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line-paper); }
.honors li {
  padding: 15px 0;
  border-bottom: 1px solid var(--line-paper);
}
.honors p { font-size: 15.2px; line-height: 1.9; }
.schedule p,
.team-card p,
.join-block > p:not(.join-way):not(.pull):not(.sticker) { text-wrap: pretty; }

/* ---------- 加入页 ---------- */
.sec--join { padding-top: 54px; }
.join-block {
  position: relative;
  padding: 28px 0 30px 18px;
  border-top: 1px solid var(--line-paper);
}
.join-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  bottom: 30px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 164, 92, 0.08));
}
.jb-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 18px; }
.jb-num {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--teal);
}
.jb-head h2 { font-size: 27px; letter-spacing: 0.05em; }
.jb-link {
  margin-left: auto;
  padding: 4px 8px;
  border: 1px solid var(--line-paper);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--paper-muted);
  text-decoration: none;
}
.join-way {
  margin-bottom: 16px;
  padding: 7px 0;
  border-top: 1px solid rgba(178, 58, 46, 0.18);
  border-bottom: 1px solid rgba(178, 58, 46, 0.18);
  font-family: var(--sans);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--seal);
}
.join-block > p:not(.join-way):not(.pull):not(.sticker) { font-size: 15px; line-height: 1.98; }
.pull {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 14.8px;
  line-height: 1.95;
  color: var(--paper-muted);
}
.sticker {
  display: inline-block;
  margin-top: 16px;
  padding: 5px 10px;
  border: 1px solid rgba(178, 58, 46, 0.4);
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--seal);
}
.steps { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; }
.steps span {
  padding: 5px 9px;
  border: 1px solid var(--line-paper);
  background: rgba(255, 255, 255, 0.5);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.steps i { font-style: normal; font-size: 10px; color: var(--gold-deep); }

/* 招新群 */
.sec--recruit { padding-top: 48px; }
.recruit-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}
.qr-glow {
  position: absolute;
  top: 6%;
  left: 50%;
  width: 290px;
  height: 290px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(50% 50% at 50% 50%, var(--teal-glow), transparent 70%);
  filter: blur(12px);
  pointer-events: none;
}
.qr-card {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 26px 60px rgba(0, 0, 0, 0.45);
}
.qr-caption {
  margin-top: 20px;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold-2);
}
.qq-number {
  margin-top: 8px;
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--teal-light);
  font-variant-numeric: tabular-nums;
}
.recruit-card .btn { margin-top: 18px; }
.signup-pending {
  width: 100%;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(237, 230, 215, 0.12);
  text-align: center;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--dark-muted);
}
.signup-pending span { color: var(--seal); }

/* 辩论人格海报 */
.sec--dbti { padding-top: 54px; }
.dbti-poster {
  position: relative;
  overflow: hidden;
  padding: 26px 20px 22px;
  border: 1px solid rgba(201, 164, 92, 0.42);
  background:
    radial-gradient(80% 50% at 92% 0%, var(--teal-glow), transparent 66%),
    linear-gradient(160deg, #0c1e33 0%, #060f1c 62%, #081525 100%);
  color: var(--paper);
  box-shadow: 0 30px 70px rgba(6, 15, 28, 0.28);
}
.dbti-poster::before,
.dbti-poster::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  pointer-events: none;
}
.dbti-poster::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid var(--gold);
  border-left: 1px solid var(--gold);
}
.dbti-poster::after {
  right: -1px;
  bottom: -1px;
  border-right: 1px solid var(--teal-light);
  border-bottom: 1px solid var(--teal-light);
}
.dbti-eyebrow {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--teal-light);
}
.dbti-title {
  margin-top: 12px;
  font-size: clamp(26px, 7vw, 30px);
  line-height: 1.42;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.dbti-sub {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(242, 235, 221, 0.72);
}
.dbti-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 22px;
}
.dbti-tile {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  padding: 8px;
  border: 1px solid rgba(143, 211, 221, 0.18);
  background: rgba(255, 255, 255, 0.035);
}
.dbti-tile img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.dbti-meta { display: flex; gap: 8px; margin-top: 18px; }
.dbti-meta span {
  padding: 4px 9px;
  border: 1px solid rgba(143, 211, 221, 0.35);
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--teal-light);
}
.dbti-poster .btn { margin-top: 20px; }

/* 收尾 */
.sec--closing { padding-bottom: 90px; }
.closing-quote {
  font-size: clamp(30px, 8.2vw, 36px);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.js .closing-wipe { display: block; clip-path: inset(0 100% 0 0); }
.closing-quote.is-in .closing-wipe {
  clip-path: inset(0 0 0 0);
  transition: clip-path 1.25s var(--ease) 0.1s;
}
.to-top {
  display: flex;
  width: max-content;
  margin: 44px auto 0;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(201, 164, 92, 0.4);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold-2);
  text-decoration: none;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 44px var(--pad) calc(40px + env(safe-area-inset-bottom));
  border-top: 1px solid rgba(201, 164, 92, 0.14);
  background: var(--ink-deep);
  text-align: center;
  color: var(--dark-muted);
}
.footer-emblem { opacity: 0.85; margin-bottom: 14px; }
.footer-name {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: rgba(237, 230, 215, 0.78);
}
.footer-motto { margin-top: 10px; font-size: 13.5px; letter-spacing: 0.12em; color: var(--teal-light); }
.footer-meta {
  margin-top: 8px;
  font-family: var(--sans);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  color: rgba(237, 230, 215, 0.42);
}

/* ---------- 进场 ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.js .whisper.reveal {
  filter: blur(2px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease), filter 1s var(--ease);
}
.js .whisper.reveal.is-in { filter: blur(0); }

/* ---------- 关键帧 ---------- */
@keyframes charUp { to { transform: translateY(0); } }
@keyframes cue {
  0% { top: -100%; }
  60%, 100% { top: 100%; }
}
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.035); opacity: 1; }
}
@keyframes stamp {
  0% { opacity: 0; transform: scale(1.55); filter: blur(3px); }
  60% { opacity: 1; filter: blur(0); }
  100% { opacity: 1; transform: scale(1); filter: blur(0); }
}
@keyframes stampSeal {
  0% { opacity: 0; transform: scale(1.6); filter: blur(3px); }
  60% { opacity: 1; filter: blur(0); }
  100% { opacity: 1; transform: scale(1); filter: blur(0); }
}

/* ---------- 跨页过渡（渐进增强） ---------- */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vtOut 0.18s ease both; }
::view-transition-new(root) { animation: vtIn 0.32s ease both; }
@keyframes vtOut { to { opacity: 0; } }
@keyframes vtIn { from { opacity: 0; transform: translateY(6px); } }

/* ---------- 适配 ---------- */
@media (min-width: 400px) {
  :root { --pad: 26px; }
}
@media (max-width: 370px) {
  :root { --pad: 18px; }
  .hero-title { font-size: 66px; }
  .display-title { font-size: 64px; }
  .couplet { gap: 12px; min-height: 380px; }
  .col { font-size: 15px; letter-spacing: 0.26em; }
  .advisor-photo { width: 88px; }
  .nav { gap: 13px; }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }
  .js .reveal { opacity: 1 !important; transform: none !important; filter: none !important; }
  .js .seal-stamp { opacity: 1 !important; transform: scale(1) !important; }
  .js .closing-quote { clip-path: none !important; }
  .js .closing-wipe { clip-path: none !important; }
  .js .changhua-frame .col { clip-path: none !important; }
  .hero-title .ch,
  .display-title .ch { transform: none !important; }
  .echo, .hero-field::before { animation: none !important; }
  .photo-feather.is-in img { transform: none !important; }
  .schedule::after { transform: scaleY(1) !important; }
  .scroll-cue i::after { animation: none !important; opacity: 0; }
  .btn--primary::after { display: none; }
}