/* ==========================================================================
   追光者 · niuzh —— 纪念网页
   主题：在暗处打磨光（EUV 13.5nm / 晶圆 / 金与幽蓝）
   ========================================================================== */

:root {
  --bg:        #05070d;
  --bg-soft:   #080c15;
  --bg-card:   rgba(255, 255, 255, 0.028);
  --ink:       #e9eef7;
  --ink-dim:   #a7b2c4;
  --muted:     #7c8798;
  --gold:      #e6c079;
  --gold-lt:   #f7e5bd;
  --blue:      #6fb7ff;
  --ember:     #ff9d4d;
  --line:      rgba(230, 192, 121, 0.16);
  --line-soft: rgba(255, 255, 255, 0.07);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", "Times New Roman", serif;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --nav-h: 64px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 底纹与氛围 ------------------------------------------------------------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(900px 620px at 50% -10%, rgba(230, 192, 121, 0.13), transparent 62%),
    radial-gradient(700px 560px at 12% 34%, rgba(111, 183, 255, 0.08), transparent 65%),
    radial-gradient(760px 620px at 92% 76%, rgba(255, 157, 77, 0.06), transparent 68%),
    linear-gradient(180deg, #05070d 0%, #070b13 45%, #05070d 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(230, 192, 121, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 192, 121, 0.05) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(circle at 50% 32%, rgba(0,0,0,0.75), transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 32%, rgba(0,0,0,0.75), transparent 78%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.30;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.42'/></svg>");
}

#photons {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

::selection { background: rgba(230, 192, 121, 0.28); color: #fff; }

/* 滚动进度条 ------------------------------------------------------------- */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  z-index: 60;
  background: linear-gradient(90deg, var(--blue), var(--gold), var(--ember));
  box-shadow: 0 0 14px rgba(230, 192, 121, 0.55);
  transition: width 0.1s linear;
}

/* 导航 ------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 clamp(16px, 4vw, 46px);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), height 0.4s var(--ease);
}

.nav.is-stuck {
  background: rgba(5, 7, 13, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  height: 56px;
}

.nav__brand {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.16em;
  color: var(--gold-lt);
  text-decoration: none;
  white-space: nowrap;
}
.nav__brand i { color: var(--muted); font-style: normal; margin: 0 6px; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav__list::-webkit-scrollbar { display: none; }

.nav__list a {
  position: relative;
  display: block;
  padding: 6px 2px;
  font-size: 13.5px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s var(--ease);
}
.nav__list a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav__list a:hover { color: var(--gold-lt); }
.nav__list a:hover::after,
.nav__list a.is-active::after { transform: scaleX(1); }
.nav__list a.is-active { color: var(--gold); }

/* 首屏 ------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 40px) 22px 90px;
  overflow: hidden;
}

.hero__halo {
  position: absolute;
  top: 46%;
  left: 50%;
  width: min(760px, 118vw);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(230, 192, 121, 0.16), rgba(230, 192, 121, 0.05) 42%, transparent 66%);
  filter: blur(6px);
  animation: breathe 7s ease-in-out infinite;
  pointer-events: none;
}

@keyframes breathe {
  0%, 100% { opacity: 0.75; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 1;    transform: translate(-50%, -50%) scale(1.07); }
}

.hero__inner { position: relative; max-width: 900px; }

.hero__kicker {
  margin: 0 0 26px;
  font-size: 13px;
  letter-spacing: 0.42em;
  color: var(--gold);
  text-transform: uppercase;
  animation: fadeUp 1s var(--ease) both;
}

.hero__name {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(58px, 13vw, 148px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: clamp(6px, 2.4vw, 26px);
  text-indent: clamp(3px, 1.2vw, 13px);
  background: linear-gradient(180deg, #fffaf0 0%, var(--gold-lt) 34%, var(--gold) 68%, #a3762f 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 34px rgba(230, 192, 121, 0.33));
  animation: nameIn 1.5s var(--ease) both;
}

@keyframes nameIn {
  from { opacity: 0; letter-spacing: 0.35em; filter: blur(16px) drop-shadow(0 0 0 rgba(230,192,121,0)); }
  to   { opacity: 1; }
}

.hero__sub {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-size: clamp(16px, 2.5vw, 23px);
  letter-spacing: 0.16em;
  color: var(--ink);
  animation: fadeUp 1.2s 0.35s var(--ease) both;
}

.hero__line {
  margin: 26px 0 0;
  min-height: 1.9em;
  font-size: clamp(13.5px, 1.9vw, 16px);
  letter-spacing: 0.1em;
  color: var(--gold-lt);
}
.caret {
  display: inline-block;
  width: 1px;
  height: 1.05em;
  margin-left: 3px;
  vertical-align: -0.16em;
  background: var(--gold);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.hero__marks {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px 20px;
  margin: 40px 0 0;
  font-family: var(--serif);
  font-size: clamp(13px, 1.8vw, 15px);
  letter-spacing: 0.18em;
  color: var(--muted);
}
.hero__marks b { color: var(--gold); font-weight: 400; font-size: 1.28em; }
.hero__marks em {
  width: 34px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.hero__note {
  margin: 34px 0 0;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: rgba(167, 178, 196, 0.6);
}

.hero__scroll {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}
.hero__scroll:hover { color: var(--gold); }
.hero__scroll i {
  display: block;
  width: 1px; height: 34px;
  background: linear-gradient(180deg, transparent, var(--gold));
  animation: drip 2.1s ease-in-out infinite;
}
@keyframes drip {
  0%, 100% { opacity: 0.25; transform: scaleY(0.55); transform-origin: top; }
  50%      { opacity: 1;    transform: scaleY(1);    transform-origin: top; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 通用区块 --------------------------------------------------------------- */
.section {
  position: relative;
  max-width: 1040px;
  margin: 0 auto;
  padding: clamp(76px, 11vw, 140px) clamp(20px, 5vw, 40px);
}

.section__head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 64px); }

.eyebrow {
  margin: 0 0 16px;
  font-size: 12.5px;
  letter-spacing: 0.44em;
  color: var(--gold);
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px; height: 1px;
  margin-right: 12px;
  vertical-align: 4px;
  background: var(--gold);
  opacity: 0.7;
}

.section h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: #fdfbf6;
}

.lede {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 2.05;
  color: var(--ink-dim);
}

/* 铭文 ------------------------------------------------------------------- */
.verse {
  max-width: 640px;
  margin: 0;
  padding-left: clamp(16px, 3vw, 30px);
  border-left: 1px solid var(--line);
  font-family: var(--serif);
  font-size: clamp(16px, 2.2vw, 19.5px);
  line-height: 2.35;
  letter-spacing: 0.08em;
  color: #eef2f8;
}
.verse p { margin: 0 0 4px; }
.verse b { color: var(--gold-lt); font-weight: 400; }
.verse--dim { margin-top: 34px; color: var(--ink-dim); }

.pullquote {
  margin: clamp(48px, 7vw, 76px) 0 0;
  text-align: center;
}
.pullquote p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(15px, 2vw, 18px);
  letter-spacing: 0.22em;
  color: var(--muted);
}
.pullquote__big {
  margin-top: 12px !important;
  font-size: clamp(30px, 6vw, 58px) !important;
  letter-spacing: 0.14em !important;
  background: linear-gradient(180deg, #fffdf7, var(--gold) 62%, #96551f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 26px rgba(230, 192, 121, 0.25));
}

/* 三程时间轴 ------------------------------------------------------------- */
.road {
  position: relative;
  margin: 0;
  padding: 0 0 0 clamp(30px, 6vw, 64px);
  list-style: none;
}
.road::before {
  content: "";
  position: absolute;
  top: 6px; bottom: 6px; left: clamp(9px, 1.6vw, 14px);
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line) 8%, var(--line) 88%, transparent);
}

.road__item { position: relative; padding-bottom: clamp(44px, 6vw, 68px); }
.road__item:last-child { padding-bottom: 0; }

.road__item::before {
  content: "";
  position: absolute;
  left: calc(clamp(9px, 1.6vw, 14px) - clamp(30px, 6vw, 64px));
  top: 10px;
  width: 9px; height: 9px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(230, 192, 121, 0.09), 0 0 16px rgba(230, 192, 121, 0.55);
}

.road__no {
  display: block;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.4em;
  color: var(--gold);
  opacity: 0.85;
}
.road__title {
  margin: 10px 0 6px;
  font-family: var(--serif);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 400;
  letter-spacing: 0.14em;
  color: #fdfbf6;
}
.road__era {
  margin: 0 0 14px;
  font-size: 13.5px;
  letter-spacing: 0.1em;
  color: var(--gold-lt);
  opacity: 0.85;
}
.road__text {
  margin: 0;
  max-width: 660px;
  font-size: 15px;
  line-height: 2.05;
  color: var(--ink-dim);
}

/* 语录 ------------------------------------------------------------------- */
.words {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 18px;
}

.word {
  position: relative;
  padding: clamp(24px, 3vw, 32px);
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), background 0.5s var(--ease);
}
.word::after {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
}
.word:hover {
  transform: translateY(-5px);
  border-color: var(--line);
  background: rgba(230, 192, 121, 0.045);
}
.word:hover::after { opacity: 1; }

.word__tag {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.34em;
  color: var(--gold);
}
.word__line {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(17px, 2.1vw, 20px);
  line-height: 1.85;
  letter-spacing: 0.05em;
  color: #fbf9f4;
}
.word__sub {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--muted);
}

/* 数字 ------------------------------------------------------------------- */
.figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.figure {
  padding: clamp(26px, 3.4vw, 40px) clamp(18px, 2.4vw, 26px);
  text-align: center;
  background: var(--bg-soft);
  transition: background 0.5s var(--ease);
}
.figure:hover { background: rgba(230, 192, 121, 0.05); }

.figure__num {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(36px, 6vw, 58px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  background: linear-gradient(180deg, #fffdf6, var(--gold) 70%, #a3762f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.figure__num span {
  margin-left: 6px;
  font-size: 0.3em;
  letter-spacing: 0.2em;
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
}
.figure__cap {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.95;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* 点灯 ------------------------------------------------------------------- */
.section--candle { max-width: 1100px; }

.lightfield {
  position: relative;
  height: clamp(240px, 34vw, 330px);
  margin-bottom: 34px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 120%, rgba(230, 192, 121, 0.11), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,0.014), rgba(0,0,0,0.22));
}
.lightfield::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.candle {
  position: absolute;
  width: 10px;
  height: 14px;
  transform: translate(-50%, 0) scale(var(--s, 1));
}

.candle i {
  position: absolute;
  inset: 0;
  border-radius: 50% 50% 46% 46% / 62% 62% 38% 38%;
  background: radial-gradient(circle at 50% 72%, #fff6e0 0%, var(--ember) 42%, rgba(255, 110, 30, 0.15) 78%, transparent 100%);
  animation: flicker 2.6s ease-in-out infinite;
}

.candle.is-new i {
  animation: candleIn 0.75s var(--ease) both, flicker 2.6s 0.75s ease-in-out infinite;
}
@keyframes candleIn {
  from { opacity: 0; transform: translateY(14px) scale(0.4); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.candle::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 66px; height: 66px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 157, 77, 0.34), transparent 68%);
  animation: flicker 3.4s ease-in-out infinite reverse;
}
.candle--gold i {
  background: radial-gradient(circle at 50% 72%, #fffdf3 0%, var(--gold) 44%, rgba(230, 192, 121, 0.14) 78%, transparent 100%);
}
.candle--gold::before { background: radial-gradient(circle, rgba(230, 192, 121, 0.32), transparent 68%); }

@keyframes flicker {
  0%, 100% { opacity: 0.92; transform: scale(1) }
  25%      { opacity: 1;    transform: scale(1.06, 0.96) }
  50%      { opacity: 0.85; transform: scale(0.96, 1.05) }
  75%      { opacity: 1;    transform: scale(1.03, 0.99) }
}

.spark {
  position: absolute;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 8px rgba(255, 157, 77, 0.9);
  pointer-events: none;
  animation: spark 1.05s ease-out forwards;
}
@keyframes spark {
  from { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  to   { opacity: 0; transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(0.2); }
}

.candle-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px 26px;
}

.candle-count {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.candle-count b {
  font-family: var(--serif);
  font-size: 1.5em;
  font-weight: 400;
  color: var(--gold);
  margin: 0 3px;
}

/* 按钮 ------------------------------------------------------------------- */
.btn {
  appearance: none;
  cursor: pointer;
  padding: 13px 30px;
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--gold-lt);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), box-shadow 0.35s var(--ease), transform 0.2s var(--ease);
}
.btn:hover {
  background: rgba(230, 192, 121, 0.1);
  box-shadow: 0 0 26px rgba(230, 192, 121, 0.22);
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 1px solid var(--gold); outline-offset: 3px; }

.btn--gold {
  background: linear-gradient(180deg, rgba(230, 192, 121, 0.2), rgba(230, 192, 121, 0.07));
  color: #fff8e8;
}
.btn--gold:hover { background: linear-gradient(180deg, rgba(230, 192, 121, 0.34), rgba(230, 192, 121, 0.14)); }

/* 留言簿 ----------------------------------------------------------------- */
.book-form {
  display: grid;
  gap: 12px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
}

.book-form__name,
.book-form__text {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--sans);
  font-size: 14.5px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  outline: none;
  resize: vertical;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.book-form__name::placeholder,
.book-form__text::placeholder { color: rgba(124, 135, 152, 0.72); }
.book-form__name:focus,
.book-form__text:focus {
  border-color: var(--line);
  box-shadow: 0 0 0 3px rgba(230, 192, 121, 0.08);
}

.book-form__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.book-form__hint {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}

.book-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.book-item {
  position: relative;
  padding: 18px 20px 18px 22px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line-soft);
  border-left: 2px solid rgba(230, 192, 121, 0.34);
  border-radius: 2px;
  animation: fadeUp 0.6s var(--ease) both;
}
.book-item__text {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 2;
  letter-spacing: 0.05em;
  color: #f2f5fa;
  word-break: break-word;
}
.book-item__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.book-item__name { color: var(--gold-lt); }
.book-item__del {
  margin-left: auto;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  cursor: pointer;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.book-item__del:hover { color: #ff9d8a; border-color: rgba(255, 157, 77, 0.4); }

.book-empty {
  margin: 22px 0 0;
  font-size: 13.5px;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.1em;
}

/* 页脚 ------------------------------------------------------------------- */
.footer {
  padding: clamp(56px, 8vw, 90px) 24px clamp(48px, 6vw, 70px);
  text-align: center;
  border-top: 1px solid var(--line-soft);
}
.footer__line {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-size: clamp(15px, 2.2vw, 19px);
  letter-spacing: 0.16em;
  color: var(--gold-lt);
}
.footer__meta {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.noscript {
  margin: 0;
  padding: 16px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
}

/* 入场动效 --------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }

/* 响应式 ----------------------------------------------------------------- */
@media (max-width: 720px) {
  .nav__list { gap: 14px; }
  .nav__list a { font-size: 12.5px; letter-spacing: 0.06em; }
  .nav__brand { font-size: 15px; letter-spacing: 0.1em; }
  .hero { padding-bottom: 120px; }
  .hero__marks em { width: 18px; }
  .road { padding-left: 28px; }
  .road__item::before { left: -19px; }
  .figures { grid-template-columns: repeat(2, 1fr); }
  .book-form__foot { justify-content: stretch; }
  .book-form__foot .btn { width: 100%; }
}

@media (max-width: 420px) {
  .figures { grid-template-columns: 1fr; }
}

/* 无障碍：减少动态 ------------------------------------------------------- */
@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;
  }
  .reveal { opacity: 1; transform: none; }
}