/* ============================================================
   CHIRON SUPER SPORT — v1
   设计语言:官网(滚动叙事/遮盖画廊/360° scrub/大数字规格)
             × divo 站(界面语言/顶栏/章节菜单/进度表盘)
   色彩:近黑底 + 布加迪蓝 #004bfa,无橙色
   ============================================================ */

/* ---------- 字体 ---------- */
@font-face {
  font-family: 'Bugatti Display';
  src: url('../fonts/bugatti-display-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Bugatti Mono';
  src: url('../fonts/bugatti-mono-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Bugatti Text';
  src: url('../fonts/bugatti-text-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Bugatti Text';
  src: url('../fonts/bugatti-text-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}

/* ---------- 变量 ---------- */
:root {
  --bg:        #050507;
  --bg-soft:   #0a0b0f;
  --panel:     #12141c;
  --ink:       #f2f2f5;
  --ink-dim:   #a9a9b3;
  --ink-faint: #7d7d88;
  --accent:    #004bfa;
  --accent-soft: #3f7bff;
  --line:      rgba(255, 255, 255, 0.12);
  --line-soft: rgba(255, 255, 255, 0.07);
  --glass:     rgba(255, 255, 255, 0.05);
  --font-display: 'BUGATTI Display', 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-text:    'BUGATTI Text', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono:    'BUGATTI Mono', 'Consolas', 'Courier New', monospace;
  --w-doc: 1280px;
  --w-prose: 660px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 18px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--accent); color: #fff; }
img { display: block; max-width: 100%; height: auto; }
video { display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }
.mono { font-family: var(--font-mono); }

/* 内容区宽度约束 */
.wrap { max-width: var(--w-doc); margin: 0 auto; padding: 0 clamp(1.5rem, 5vw, 4rem); }

/* ---------- 顶栏(divo 同款) ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 22px 24px;
  transition: background 0.5s, padding 0.5s, backdrop-filter 0.5s;
}

/* 首屏(hero)隐藏顶栏:除 svg 外无任何标识 */
.nav.is-hero {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
}
.nav {
  transition: background 0.5s, padding 0.5s, backdrop-filter 0.5s, opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.nav.is-solid {
  background: rgba(5, 5, 7, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav__brand { display: flex; align-items: baseline; gap: 12px; color: #fff; }
.nav__brand svg { height: 18px; width: auto; }
.nav__brand-sub {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.34em;
  color: var(--ink-dim);
}
.nav__now {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(10, 11, 15, 0.6);
  border-radius: 0;
  white-space: nowrap;
  max-width: 34vw;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.3s, border-color 0.3s;
}
.nav__now::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0, 75, 250, 0.8);
  flex-shrink: 0;
}
.nav__lang {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: opacity 0.6s var(--ease);
}
.lang-btn {
  padding: 8px 6px;
  border: none;
  background: none;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  position: relative;
  transition: color 0.3s;
  cursor: pointer;
}
.lang-btn::after {
  content: '';
  position: absolute;
  left: 6px; right: 6px; bottom: 4px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}
.lang-btn:hover { color: var(--ink); }
.lang-btn:hover::after { transform: scaleX(1); }
.lang-btn.is-on { color: var(--ink); }
.lang-btn.is-on::after { transform: scaleX(1); }
.nav__menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--ink);
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(10, 11, 15, 0.6);
  border-radius: 0;
  cursor: pointer;
  transition: border-color 0.3s;
  font-family: var(--font-mono);
}
.nav__menu-btn:hover { border-color: var(--accent); }
.nav__menu-icon { position: relative; width: 16px; height: 10px; }
.nav__menu-icon i {
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: transform 0.35s var(--ease), opacity 0.25s;
}
.nav__menu-icon i:first-child { top: 0; }
.nav__menu-icon i:last-child { bottom: 0; }
.nav__menu-btn[aria-expanded="true"] i:first-child { transform: translateY(4.5px) rotate(45deg); }
.nav__menu-btn[aria-expanded="true"] i:nth-child(2) { opacity: 0; }
.nav__menu-btn[aria-expanded="true"] i:last-child { transform: translateY(-4.5px) rotate(-45deg); }
.nav__progress {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: transparent;
}
.nav__progress i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  box-shadow: 0 0 10px rgba(0, 75, 250, 0.6);
  transition: width 0.15s linear;
}

/* ---------- 章节菜单浮层(divo 同款) ---------- */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 89;
  background: rgba(5, 5, 7, 0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease), visibility 0.4s;
}
.menu-overlay.is-open { opacity: 1; visibility: visible; }
.menu-overlay__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(140px, 240px));
  gap: 6px 40px;
  padding: 24px;
}
.menu-overlay__nav a {
  display: flex;
  gap: 12px;
  padding: 14px 10px;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.1em;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  transition: color 0.3s, border-color 0.3s, padding-left 0.3s;
}
.menu-overlay__nav a:hover { color: var(--accent-soft); border-color: var(--accent); padding-left: 16px; }
.menu-overlay__nav a .idx { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); align-self: center; }
.menu-overlay__sub {
  position: absolute;
  bottom: 6vh;
  left: 0; right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

/* ---------- 滚动进度表盘(divo 同款) ---------- */
.scroll-gauge {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 44px; height: 44px;
  z-index: 90;
  opacity: 0;
  transition: opacity 0.5s;
}
.scroll-gauge.is-on { opacity: 1; }
.scroll-gauge svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.scroll-gauge circle { fill: none; stroke-width: 2; }
.scroll-gauge .sg__bar {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 119.4;
  stroke-dashoffset: 119.4;
}
.sg__num {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 10px;
  color: var(--ink-dim);
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}
.hero__media { position: absolute; inset: 0; }
.hero__media video, .hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__media video { filter: brightness(1.08) saturate(.96) contrast(1.03); }
.hero__media .hero__parallax { will-change: transform; transform: scale(1.1); }
.hero__veil {
  position: absolute; inset: 0;
  background:
    linear-gradient(to bottom, rgba(5,5,7,.45) 0%, rgba(5,5,7,.08) 45%, rgba(5,5,7,.92) 100%),
    linear-gradient(to right, rgba(5,5,7,.35), transparent 60%);
}
.hero__content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
}
.hero__mini {
  margin-top: 1.6rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .44em;
  text-transform: uppercase;
  color: rgba(242, 242, 245, .82);
  text-shadow: 0 2px 18px rgba(0,0,0,.7);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 1s var(--ease) .6s, transform 1s var(--ease) .6s;
}
.hero.is-in .hero__mini { opacity: 1; transform: none; }
.hero__wordmark {
  display: inline-block;
  width: min(72vw, 540px);
  filter: invert(1);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 1s var(--ease) .2s, transform 1s var(--ease) .2s;
}
.hero.is-in .hero__wordmark { opacity: 1; transform: none; }
.hero__tag {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 1.5rem 0 0;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 1s var(--ease) .5s, transform 1s var(--ease) .5s;
}
.hero.is-in .hero__tag { opacity: 1; transform: none; }
.hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3.2rem, 9.5vw, 8.5rem);
  line-height: 1;
  letter-spacing: .03em;
  color: var(--ink);
  margin-top: 1.2rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s var(--ease) .7s, transform 1s var(--ease) .7s;
}
.hero.is-in .hero__title { opacity: 1; transform: none; }
.hero__title .latin {
  display: block;
  font-family: var(--font-mono);
  font-size: .18em;
  letter-spacing: .5em;
  color: var(--ink-faint);
  margin-top: 1.2rem;
  text-transform: uppercase;
}
.hero__sub {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: var(--ink-dim);
  margin-top: 1.3rem;
  max-width: 38em;
  margin-left: auto; margin-right: auto;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 1s var(--ease) .9s, transform 1s var(--ease) .9s;
}
.hero.is-in .hero__sub { opacity: 1; transform: none; }
.hero__data {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(1.4rem, 4vw, 3.6rem);
  margin-top: clamp(1.8rem, 4.5vh, 2.8rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 1s var(--ease) 1.1s, transform 1s var(--ease) 1.1s;
}
.hero.is-in .hero__data { opacity: 1; transform: none; }
.hero__data > div { display: flex; flex-direction: column; gap: .15rem; text-align: left; }
.hero__data b {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 400; line-height: 1;
  letter-spacing: .02em;
}
.hero__data b em { font-style: normal; color: var(--accent-soft); }
.hero__data span {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .28em; color: var(--ink-faint);
  text-transform: uppercase;
}
.hero__scroll {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: .7rem;
  letter-spacing: .5em; color: var(--ink-faint);
  display: flex; flex-direction: column; align-items: center; gap: .7rem;
}
.hero__scroll::after {
  content: '';
  width: 1px; height: 3rem;
  background: linear-gradient(to bottom, var(--ink-faint), transparent);
  animation: scrollPulse 2.4s var(--ease) infinite;
}
@keyframes scrollPulse {
  0% { transform: scaleY(0); transform-origin: top; }
  45% { transform: scaleY(1); transform-origin: top; }
  55% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 章节大标题(divo 风格) ---------- */
.chapter-break {
  padding: clamp(5rem, 12vh, 9rem) 0 clamp(3rem, 7vh, 5rem);
  position: relative;
  overflow: hidden;
}
.chapter-break__inner {
  max-width: var(--w-doc);
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  display: flex;
  align-items: flex-start;
  gap: clamp(1.4rem, 3vw, 2.6rem);
  position: relative;
}
.chapter-break__no {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.28);
  flex-shrink: 0;
}
.chapter-break h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 5.4vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: .03em;
}
.chapter-break h2 .latin {
  display: block;
  font-family: var(--font-mono);
  font-size: .28em;
  letter-spacing: .5em;
  color: var(--ink-faint);
  margin-top: .9rem;
  text-transform: uppercase;
}
.chapter-break__sub {
  margin-top: 1rem;
  font-size: 1.02rem;
  color: var(--ink-dim);
  max-width: 42em;
}
.chapter-break--dark { background: var(--bg-soft); }
/* 章节头水印大数字 */
.chapter-break__wm {
  position: absolute;
  right: -2vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(12rem, 30vw, 26rem);
  line-height: 1;
  color: rgba(255, 255, 255, 0.025);
  pointer-events: none;
  user-select: none;
}

/* ---------- 通用章节 ---------- */
.chapter { padding: clamp(3rem, 8vh, 6rem) 0; position: relative; }
.chapter--dark { background: var(--bg-soft); }
.ch-head { margin-bottom: clamp(2.4rem, 6vh, 4rem); }
.ch-head__tag {
  display: flex; align-items: center; gap: 1.1rem;
  font-family: var(--font-mono); font-size: .8rem;
  letter-spacing: .4em; text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.3rem;
}
.ch-head__tag::before { content: ''; width: 3rem; height: 1px; background: var(--line); }
.ch-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: .03em;
}
.ch-head h2 .latin {
  display: block;
  font-family: var(--font-mono);
  font-size: .3em;
  letter-spacing: .5em;
  color: var(--ink-faint);
  margin-top: 1rem;
  text-transform: uppercase;
}

/* 段落 */
.prose { max-width: var(--w-prose); }
.prose p { margin-bottom: 1.4em; }
.prose p b { color: var(--ink); font-weight: 700; }
.lead {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  line-height: 1.75;
  color: var(--ink);
  letter-spacing: .01em;
}

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 360° 旋转(scroll scrub,官网同款) ---------- */
.scrub { position: relative; }
/* 320vh:滚动 320vh 转 360°,缓速从容;配合 JS 弹簧惯性更丝滑 */
.scrub__track { position: relative; height: 320vh; }
.scrub__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: #000;
}
.scrub__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.scrub__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}
.scrub__veil {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(5,5,7,.5) 0%, transparent 30%, transparent 68%, rgba(5,5,7,.55) 100%),
              radial-gradient(ellipse at center, transparent 52%, rgba(5,5,7,.35) 100%);
  pointer-events: none;
}
.scrub__ui {
  position: absolute;
  top: 0; left: 0; right: 0;
  padding: clamp(5.2rem, 9vh, 6.5rem) clamp(1.5rem, 5vw, 4rem) 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
}
.scrub__label {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .4em;
  text-transform: uppercase;
  color: var(--ink-dim);
}
.scrub__prog {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .3em;
  color: var(--ink-dim);
}
.scrub__prog b { color: var(--ink); font-weight: 400; }
.scrub__texts {
  position: absolute;
  left: clamp(1.5rem, 5vw, 4rem);
  bottom: clamp(2.4rem, 8vh, 4.5rem);
  max-width: 430px;
  pointer-events: none;
}
.scrub__text {
  position: absolute;
  left: 0; bottom: 0;
  width: min(400px, 84vw);
  min-height: 168px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1rem, 2.2vw, 1.5rem);
  border-radius: 10px;
  background: rgba(10, 11, 15, 0.5);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
  will-change: opacity, transform;
}
.scrub__text.is-on { opacity: 1; transform: none; }
.scrub__text h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  line-height: 1.55;
  letter-spacing: .02em;
  text-shadow: 0 2px 24px rgba(0,0,0,.6);
}
.scrub__text h3 em { font-style: normal; color: var(--accent-soft); }
.scrub__text p {
  margin-top: .75rem;
  font-size: .92rem;
  line-height: 1.9;
  color: rgba(242, 242, 245, .86);
  text-shadow: 0 2px 16px rgba(0,0,0,.7);
}
.scrub__meter {
  position: absolute;
  right: clamp(1.5rem, 5vw, 4rem);
  bottom: clamp(2.4rem, 8vh, 4.5rem);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .32em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.scrub__meter i {
  display: block;
  width: 150px;
  height: 1px;
  background: rgba(255,255,255,.22);
  position: relative;
  overflow: hidden;
}
.scrub__meter i::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .12s linear;
}
.scrub__deg { font-size: 1.1rem; color: var(--ink); letter-spacing: .1em; }
.scrub__deg b { font-weight: 400; color: var(--accent-soft); }

/* 移动端:360° 退化为静态 + 自动轮播 */
@media (max-width: 860px) {
  .scrub__track { height: 100vh; }
  .scrub__sticky { height: 100svh; }
  .scrub__video { display: none; }
  .scrub__poster { display: block; }
  .scrub__texts { bottom: 6rem; }
  .scrub__meter { display: none; }
  .scrub__text { position: static; opacity: 0; pointer-events: none; }
  .scrub__texts { position: relative; height: 0; }
  .scrub__text.is-on { pointer-events: none; }
  .scrub-mobile-holder { position: relative; }
}

/* 短 scrub 已移除(300+ 章不再使用第二个旋转) */
.scrub__tagline {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: .08em;
  text-shadow: 0 2px 26px rgba(0,0,0,.75);
}
.scrub__tagline em { font-style: normal; color: var(--accent-soft); }

/* ---------- 遮盖滚动画廊(官网同款机制) ---------- */
.gallery {
  position: relative;
  display: flex;
  flex-direction: row;
}
.gallery__texts {
  width: 100%;
  position: relative;
  z-index: 2;
}
.g-text {
  min-height: 130vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.25rem, 3.5vw, 2.6rem);
}
.g-text--right { align-items: flex-end; text-align: right; }
.g-text--left { align-items: flex-start; text-align: left; }
.g-text__card {
  max-width: 46ch;
  padding: clamp(1.1rem, 2.6vw, 1.8rem);
  border-radius: 10px;
  background: rgba(10, 11, 15, 0.55);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  transition: border-color .5s, transform .6s var(--ease), opacity .5s var(--ease);
}
.g-text__card.is-out {
  transform: translateY(-46px);
  opacity: 0;
}
.g-text__card.is-on { border-color: rgba(63, 123, 255, 0.4); }
.g-text__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .38em;
  color: var(--accent-soft);
  text-transform: uppercase;
  margin-bottom: .7rem;
}
.g-text__card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: .02em;
}
.g-text__card p {
  margin-top: .7rem;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink-dim);
}
.gallery__media {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.g-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: #0a0b0f;
}
.g-image {
  position: absolute;
  inset: 0;
  clip-path: inset(100% 0% 0%);
  will-change: clip-path;
}
.g-image:first-of-type { clip-path: inset(0% 0% 0%); }
.g-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(1.08) contrast(1.02);
}
.g-image__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(5,5,7,.16) 0%, transparent 34%, transparent 62%, rgba(5,5,7,.24) 100%);
  pointer-events: none;
}
.g-image__veil2 {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 44%, transparent 56%, rgba(5,5,7,.24) 100%);
  pointer-events: none;
}
.g-count {
  position: absolute;
  right: clamp(1.2rem, 3.5vw, 2.4rem);
  top: clamp(5.4rem, 9vh, 6.6rem);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .32em;
  color: rgba(242,242,245,.75);
  text-shadow: 0 2px 14px rgba(0,0,0,.7);
  z-index: 3;
  pointer-events: none;
}
.g-count b { font-weight: 400; color: var(--ink); }

/* 移动端:遮盖滚动退化为交替图文 */
@media (max-width: 980px) {
  .gallery { flex-direction: column; }
  .gallery__media { position: relative; inset: auto; }
  .g-sticky { position: relative; top: auto; height: 56vw; }
  .g-image { position: absolute; inset: 0; clip-path: inset(0% 0% 0%); opacity: 0; transition: opacity .6s; }
  .g-image:first-child { opacity: 1; }
  .g-image.is-on { opacity: 1; }
  .g-text { min-height: auto; padding: clamp(2rem, 6vw, 3rem) clamp(1.25rem, 5vw, 2.5rem); }
  .g-count { display: none; }
}

/* ---------- 性能:官网大数字卡 ---------- */
.perf-head {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 1.2rem;
}
.perf-head h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.05;
}
.perf-card {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(to bottom, rgba(255,255,255,.035), transparent 26%);
}
.perf-card__row {
  display: grid;
  grid-template-columns: minmax(110px, 200px) 1fr;
  gap: clamp(1.2rem, 4vw, 3rem);
  align-items: baseline;
  padding: clamp(1.1rem, 3vw, 1.7rem) clamp(1.1rem, 3.5vw, 2.2rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.perf-card__row:last-child { border-bottom: none; }
.perf-card__row .k {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.perf-card__row .v {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 7.5vw, 5.2rem);
  line-height: 1;
  letter-spacing: .01em;
}
.perf-card__row .v em { font-style: normal; color: var(--accent-soft); }
.perf-card__row .v small {
  font-family: var(--font-mono);
  font-size: .3em;
  letter-spacing: .3em;
  color: var(--ink-dim);
  margin-left: .5em;
  text-transform: uppercase;
}
.perf-card__row .s {
  display: block;
  font-size: .88rem;
  color: var(--ink-dim);
  margin-top: .45rem;
}

/* 数字行(divo 风格) */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1.2rem, 3vw, 2.4rem); margin-top: clamp(2rem, 5vh, 3.4rem); }
.stat b {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1;
  display: block;
}
.stat b em { font-style: normal; color: var(--accent-soft); }
.stat span {
  display: block;
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 图文交替(divo 风格) ---------- */
.media-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  margin-top: clamp(3rem, 7vh, 5.5rem);
}
.media-row--flip .media-row__media { order: 2; }
.media-row__media { overflow: hidden; background: #0e0e11; border-radius: 6px; }
.media-row__media img, .media-row__media video { width: 100%; height: auto; transition: transform 1.4s var(--ease); }
.media-row__media:hover img, .media-row__media:hover video { transform: scale(1.025); }
.media-row__body .lbl {
  display: block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: .8rem;
}
.media-row__body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: .9rem;
}
.media-row__body p { color: var(--ink-dim); }
@media (max-width: 860px) {
  .media-row { grid-template-columns: 1fr; }
  .media-row--flip .media-row__media { order: 0; }
}

/* 引用块 */
.quote { margin: clamp(2.6rem, 7vh, 5rem) auto 0; max-width: var(--w-prose); }
.quote blockquote {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  line-height: 1.45;
  letter-spacing: .01em;
}
.quote blockquote .zh {
  display: block;
  font-family: var(--font-text);
  font-size: .52em;
  color: var(--ink-dim);
  line-height: 1.9;
  margin-top: 1.6rem;
  letter-spacing: .02em;
}
.quote figcaption {
  margin-top: 1.4rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .24em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.quote figcaption b { color: var(--ink-dim); font-weight: 400; }

/* 章节视频 */
.chapter-video {
  position: relative;
  margin-top: clamp(2.6rem, 7vh, 5rem);
  overflow: hidden;
  border-radius: 6px;
}
.chapter-video video, .chapter-video img { width: 100%; height: auto; }
.chapter-video__veil {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5,5,7,.82) 0%, transparent 46%),
              linear-gradient(to bottom, rgba(5,5,7,.35), transparent 30%);
}
.chapter-video__inner {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: clamp(1.6rem, 4vw, 3rem);
}
.chapter-video__no {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .38em;
  text-transform: uppercase;
  color: var(--accent-soft);
}
.chapter-video__inner h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  margin-top: .5rem;
}
.chapter-video__inner p {
  color: var(--ink-dim);
  font-size: .95rem;
  margin-top: .4rem;
  max-width: 46em;
}

/* 大图 + 说明 */
.figure { margin: clamp(2.6rem, 7vh, 5rem) 0; }
.figure--full { margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.figure__media { overflow: hidden; background: #0e0e11; }
.figure__media img { width: 100%; transition: transform 1.4s var(--ease); }
.figure__media:hover img { transform: scale(1.02); }
.figure__cap {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-top: 1rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-faint);
}
.figure__cap .no { font-family: var(--font-mono); font-size: .78rem; color: var(--accent-soft); flex-shrink: 0; }

/* 图组 */
.figrow { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1rem, 2.5vw, 1.8rem); margin-top: clamp(2rem, 5vh, 3rem); }
.figrow--2 { grid-template-columns: repeat(2, 1fr); }
.figrow .figure { margin: 0; }
@media (max-width: 860px) {
  .figrow, .figrow--2 { grid-template-columns: 1fr; }
  .figrow .figure + .figure { margin-top: 1.4rem; }
}

/* ---------- 对比模块(300+ 章:下萨克森 vs 内华达) ---------- */
.versus {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(to bottom, rgba(255,255,255,.03), transparent 40%);
  padding: clamp(1.4rem, 3.5vw, 2.4rem);
  margin-top: clamp(2.4rem, 6vh, 4rem);
}
.versus__side h4 {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent-soft);
}
.versus__side b {
  display: block;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.1;
  margin: .5rem 0 .6rem;
}
.versus__side p { font-size: .9rem; color: var(--ink-dim); }
.versus__vs {
  align-self: center;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .3em;
  color: var(--accent-soft);
  border: 1px solid rgba(63, 123, 255, 0.4);
  border-radius: 50%;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
}
@media (max-width: 720px) {
  .versus { grid-template-columns: 1fr; }
  .versus__vs { display: none; }
  .versus__side + .versus__side { padding-top: 1.2rem; border-top: 1px solid var(--line-soft); }
}

/* ---------- 纪录时间线(数据化) ---------- */
.record__hero__inner blockquote {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.35rem, 3vw, 2.1rem);
  line-height: 1.55;
  letter-spacing: .02em;
  margin: 0 auto 1rem;
  max-width: 26em;
}
.record__hero__inner figcaption { color: var(--ink-dim); font-size: .95rem; letter-spacing: .08em; }
.record__hero__inner .kicker { margin-bottom: 1.2rem; }

/* ---------- 纪录谱系:垂直时间线(传承) ---------- */
.rec-line {
  position: relative;
  margin-top: clamp(2.5rem, 6vh, 4rem);
  padding: 1rem 0 2.5rem;
}
.rec-line::before {
  content: '';
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,.14) 10%, rgba(63,123,255,.7) 90%, transparent);
}
.rec-line__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: clamp(1.5rem, 3.6vh, 2.4rem) 0;
  border: none;
}
.rec-line__item::before {
  content: '';
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 14px rgba(0, 75, 250, .5);
  z-index: 2;
}
.rec-line__year {
  position: absolute;
  left: 0; right: 0; top: 50%;
  transform: translateY(-50%);
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.6rem);
  line-height: 1;
  letter-spacing: .1em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .08);
  pointer-events: none;
  z-index: 0;
}
.rec-line__name {
  grid-column: 1;
  text-align: right;
  padding-right: clamp(2.2rem, 7vw, 5rem);
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.35;
  position: relative;
  z-index: 1;
}
.rec-line__name small {
  display: block;
  font-family: var(--font-mono);
  font-size: .62em;
  letter-spacing: .3em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-top: .35rem;
}
.rec-line__val {
  grid-column: 2;
  text-align: left;
  padding-left: clamp(2.2rem, 7vw, 5rem);
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: .06em;
  color: var(--accent-soft);
  white-space: nowrap;
  position: relative;
  z-index: 1;
}
.rec-line__val em { font-style: normal; color: var(--ink); }
.rec-line__item:nth-child(even) .rec-line__name { grid-column: 2; text-align: left; padding-left: clamp(2.2rem, 7vw, 5rem); padding-right: 0; }
.rec-line__item:nth-child(even) .rec-line__val { grid-column: 1; text-align: right; padding-right: clamp(2.2rem, 7vw, 5rem); padding-left: 0; }
@media (max-width: 720px) {
  .rec-line::before { left: 5px; }
  .rec-line__item { grid-template-columns: 1fr; padding-left: 1.6rem; }
  .rec-line__item::before { left: 5px; }
  .rec-line__year { font-size: clamp(2.2rem, 10vw, 3rem); }
  .rec-line__name, .rec-line__val,
  .rec-line__item:nth-child(even) .rec-line__name,
  .rec-line__item:nth-child(even) .rec-line__val {
    grid-column: 1;
    text-align: left;
    padding: 0;
  }
  .rec-line__val { margin-top: .4rem; }
}

/* ---------- 300+ 纪录章 ---------- */
.record {
  position: relative;
}
.record__hero {
  position: relative;
  height: 82vh;
  min-height: 460px;
  overflow: hidden;
  border-radius: 8px;
}
.record__hero img, .record__hero video { width: 100%; height: 100%; object-fit: cover; }
.record__hero__veil {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(5,5,7,.88) 0%, transparent 55%);
}
.record__hero__inner {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: clamp(1.6rem, 4vw, 3rem);
}
.record__hero__inner .kicker {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .4em;
  color: var(--accent-soft);
  text-transform: uppercase;
}
.record__hero__inner h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.9rem, 4.6vw, 3.6rem);
  margin-top: .5rem;
}
.record__hero__inner p { color: var(--ink-dim); max-width: 52em; margin-top: .5rem; }
.record__digits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  margin-top: clamp(2rem, 5vh, 3.4rem);
}
.record__digits .d {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}
.record__digits b {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.9rem, 4.4vw, 3.2rem);
  line-height: 1;
  display: block;
}
.record__digits b em { font-style: normal; color: var(--accent-soft); }
.record__digits span {
  display: block;
  margin-top: .45rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
@media (max-width: 720px) { .record__digits { grid-template-columns: repeat(2, 1fr); } }

/* 时间线(谱系) */
.timeline { position: relative; margin-top: clamp(2rem, 5vh, 3.4rem); }
.timeline__item {
  display: grid;
  grid-template-columns: clamp(90px, 14vw, 170px) 1fr;
  gap: clamp(1.4rem, 4vw, 3.4rem);
  padding: clamp(1.6rem, 4vh, 2.6rem) 0;
  border-bottom: 1px solid var(--line-soft);
}
.timeline__item:first-child { border-top: 1px solid var(--line-soft); }
.timeline__year {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: .18em;
  color: var(--accent-soft);
  padding-top: .2rem;
}
.timeline__body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}
.timeline__body .en {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .32em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-top: .4rem;
}
.timeline__body p { color: var(--ink-dim); margin-top: .6rem; max-width: 60em; }
.timeline__body p b { color: var(--ink); font-weight: 700; }

/* 要点卡 */
.points { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.2rem, 3vw, 2.2rem); margin-top: clamp(2rem, 5vh, 3.4rem); }
.point { border: 1px solid var(--line-soft); border-radius: 8px; padding: clamp(1.3rem, 3vw, 1.9rem); background: rgba(255,255,255,.02); transition: border-color .4s, transform .4s var(--ease); }
.point:hover { border-color: rgba(63,123,255,.45); transform: translateY(-4px); }
.point__no { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .34em; color: var(--accent-soft); text-transform: uppercase; }
.point h3 { font-family: var(--font-display); font-weight: 400; font-size: 1.35rem; margin: .7rem 0 .5rem; }
.point p { font-size: .92rem; color: var(--ink-dim); }
@media (max-width: 860px) { .points { grid-template-columns: 1fr; } }

/* ---------- 规格 tabs(divo 同款) ---------- */
.specs-tabs { margin-top: clamp(1.6rem, 4vh, 2.6rem); }
.specs-tabs__nav { display: flex; flex-wrap: wrap; justify-content: space-evenly; gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
.specs-tabs__btn {
  padding: 10px 18px;
  border: 1px solid var(--line);
  background: rgba(10, 11, 15, 0.6);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  transition: color .3s, border-color .3s, background .3s;
}
.specs-tabs__btn:hover { color: var(--ink); }
.specs-tabs__btn.is-on { color: #fff; border-color: var(--accent); background: rgba(0, 75, 250, 0.14); }
.specs-tabs__panel { display: none; animation: panelIn .45s var(--ease); }
.specs-tabs__panel.is-on { display: block; }
@keyframes panelIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.specs__group { padding: 1rem 0; }
.specs__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 2rem;
  padding: .95rem .25rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: .95rem;
}
.specs__row .k { color: var(--ink-faint); }
.specs__row .v { font-family: var(--font-mono); text-align: right; letter-spacing: .04em; }
.specs__row .v .unit { font-size: .78em; color: var(--ink-faint); margin-left: .3em; }
.specs__row--hl .v { color: var(--accent-soft); }

/* 免责声明 */
.fine {
  margin-top: clamp(2rem, 5vh, 3rem);
  font-size: .8rem;
  line-height: 1.8;
  color: var(--ink-faint);
}
.fine a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 页脚(divo 风格) ---------- */
.footer { margin-top: clamp(4rem, 10vh, 7rem); border-top: 1px solid var(--line); background: var(--bg-soft); }
.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  padding: clamp(2rem, 5vh, 3.2rem) clamp(1.5rem, 5vw, 4rem) 0;
}
.footer__brand { font-family: var(--font-mono); font-size: .84rem; letter-spacing: .34em; color: var(--ink-dim); text-transform: uppercase; }
.footer__links { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .22em; }
.footer__links a { color: var(--ink-dim); transition: color .3s; }
.footer__links a:hover { color: var(--ink); }
.footer__links .sep { color: var(--ink-faint); margin: 0 .6em; }
.footer__wordmark {
  display: block;
  width: min(72vw, 640px);
  margin: clamp(2rem, 6vh, 4rem) auto 0;
  opacity: .16;
  transition: opacity 1s var(--ease);
}
.footer:hover .footer__wordmark { opacity: .3; }
.footer__disclaimer {
  padding: clamp(1.6rem, 4vh, 2.4rem) clamp(1.5rem, 5vw, 4rem) clamp(2rem, 5vh, 3rem);
  font-size: .8rem;
  line-height: 1.9;
  color: var(--ink-faint);
}
.footer__disclaimer a { text-decoration: underline; text-underline-offset: 3px; }
.footer__disclaimer p + p { margin-top: .8rem; }
.footer__disclaimer .mono { font-size: .76rem; }

/* ---------- 工具 ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 移动端 nav */
@media (max-width: 720px) {
  .nav__now { display: none; }
  .nav { padding: 14px 16px; }
  .nav.is-solid { padding: 10px 16px; }
  .nav__brand svg { height: 15px; }
  .nav__brand-sub { font-size: 13px; }
  .nav__menu-btn { padding: 7px 10px; }
  .scroll-gauge { right: 16px; bottom: 16px; width: 38px; height: 38px; }
  .menu-overlay__nav { grid-template-columns: 1fr; gap: 2px; }
  .menu-overlay__nav a { font-size: 19px; }
  .hero__data { justify-content: flex-start; text-align: left; }
  .hero__title { font-size: clamp(2.6rem, 12.5vw, 4.6rem); }
}


/* 规格章顶部数字条(原性能章数据融入) */
.spec-nums {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.2rem, 3vw, 2.4rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(1.6rem, 4vh, 2.6rem) 0;
  margin-bottom: clamp(1.6rem, 4vh, 2.6rem);
}
.spec-nums b {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1;
  display: block;
}
.spec-nums b em { font-style: normal; color: var(--accent-soft); }
.spec-nums span {
  display: block;
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
@media (max-width: 720px) { .spec-nums { grid-template-columns: repeat(2, 1fr); } }


/* ---------- 页脚(divo 同款:Hypercar 跳转 + 联系方式) ---------- */
.footer__portal {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(3.5rem, 9vh, 5.5rem) 24px clamp(3.5rem, 9vh, 5.5rem);
  margin-bottom: clamp(2.5rem, 6vh, 4rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: radial-gradient(ellipse 90% 70% at 50% 0%, rgba(77, 124, 254, 0.08), transparent 72%);
}
.footer__portal::before {
  content: 'HYPERCAR';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(64px, 13vw, 180px);
  letter-spacing: 0.1em;
  line-height: 1;
  white-space: nowrap;
  font-family: var(--font-mono);
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.06);
  pointer-events: none;
  user-select: none;
}
.footer__portal-inner { position: relative; display: flex; flex-direction: column; align-items: center; }
.footer__portal-kicker { font-size: 12px; letter-spacing: 0.42em; color: var(--accent); margin-bottom: 20px; }
.footer__portal-title { font-size: clamp(34px, 5.5vw, 56px); font-weight: 400; letter-spacing: 0.06em; line-height: 1.05; color: var(--ink); }
.footer__portal-dot { color: var(--accent); }
.footer__portal-sub { font-size: 14px; letter-spacing: 0.22em; color: var(--ink-dim); margin-top: 14px; margin-bottom: 36px; }
.footer__portal-btn {
  font-size: 13px;
  letter-spacing: 0.26em;
  color: var(--ink);
  padding: 15px 36px;
  border: 1px solid var(--line);
  transition: border-color 0.3s, color 0.3s, background 0.3s, box-shadow 0.3s;
  display: inline-block;
}
.footer__portal-btn:hover { border-color: var(--accent); color: #fff; background: var(--accent); box-shadow: 0 0 36px rgba(77, 124, 254, 0.35); }
.footer__contact {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 26px;
  flex-wrap: wrap;
}
.footer__contact-label { font-size: 11px; letter-spacing: 0.3em; color: var(--ink-faint); margin-right: 6px; }
.footer__contact-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-left: 6px; }
.footer__contact-btns .sbtn {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  padding: 13px 20px;
  min-width: 236px;
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  transition: transform 0.35s ease, border-color 0.35s, background 0.35s, box-shadow 0.45s;
}
.footer__contact-btns .sbtn svg { flex: none; width: 22px; height: 22px; opacity: 0.9; transition: color 0.3s; }
.footer__contact-btns .sbtn__txt { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; flex: 1; min-width: 0; }
.footer__contact-btns .sbtn__txt b { font-size: 13px; letter-spacing: 0.24em; font-weight: 700; line-height: 1.2; }
.footer__contact-btns .sbtn__txt small { font-size: 10px; letter-spacing: 0.08em; color: var(--ink-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.footer__contact-btns .sbtn__arrow { font-style: normal; font-size: 15px; opacity: 0; transform: translateX(-7px); transition: opacity 0.3s, transform 0.3s; }
.footer__contact-btns .sbtn:hover { transform: translateY(-3px); }
.footer__contact-btns .sbtn:hover .sbtn__arrow { opacity: 1; transform: none; }
.footer__contact-btns .sbtn--bili:hover { border-color: #00a1d6; background: rgba(0, 161, 214, 0.14); color: #fff; box-shadow: 0 14px 34px -14px rgba(0, 161, 214, 0.5); }
.footer__contact-btns .sbtn--bili:hover svg { color: #00a1d6; }
.footer__contact-btns .sbtn--bili:hover .sbtn__txt small { color: #7fd4ef; }
.footer__contact-btns .sbtn--yt:hover { border-color: #ff0033; background: rgba(255, 0, 51, 0.13); color: #fff; box-shadow: 0 14px 34px -14px rgba(255, 0, 51, 0.5); }
.footer__contact-btns .sbtn--yt:hover svg { color: #ff4d66; }
.footer__contact-btns .sbtn--yt:hover .sbtn__txt small { color: #ff9aa8; }
.footer__top {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.footer__brand { font-size: 13px; letter-spacing: 0.3em; color: var(--ink-dim); }
.footer__links { display: flex; gap: 26px; }
.footer__links a {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, color 0.3s;
}
.footer__links a:hover { border-color: var(--accent); color: #fff; }
.footer__disclaimer p {
  color: var(--ink-dim);
  font-size: 13px;
  line-height: 1.9;
  max-width: 860px;
}
.footer__disclaimer p.mono {
  margin-top: 14px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 12px;
}
.footer__disclaimer p.mono a { color: var(--ink-dim); border-bottom: 1px solid var(--line); transition: color 0.3s; }
.footer__disclaimer p.mono a:hover { color: var(--ink); }


/* ---------- 数据小卡(f80 风格:顶部色条 + 大数字) ---------- */
.bigstats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 18px;
  margin: clamp(1.6rem, 4vh, 2.6rem) 0;
}
.bigstats__item {
  border-top: 2px solid var(--accent);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.bigstats__item b { font-size: clamp(30px, 3.6vw, 44px); font-weight: 400; color: #fff; line-height: 1; font-family: var(--font-display); }
.bigstats__item b em { font-style: normal; color: var(--accent-soft); }
.bigstats__item span { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 0.2em; text-transform: uppercase; font-family: var(--font-mono); }

/* ---------- 图文卡(divo 风格) ---------- */
.hcards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: clamp(1.6rem, 4vh, 2.6rem) 0;
}
.hcard {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), rgba(18, 20, 28, 0.4));
  padding: 28px 24px 26px;
  transition: border-color 0.4s, transform 0.4s var(--ease);
}
.hcard:hover { border-color: rgba(63, 123, 255, 0.5); transform: translateY(-6px); }
.hcard__year { font-size: 12px; color: var(--ink-faint); letter-spacing: 0.24em; font-family: var(--font-mono); }
.hcard h3 { font-weight: 400; font-size: 28px; margin: 14px 0 8px; letter-spacing: 0.04em; font-family: var(--font-display); }
.hcard__num { font-size: 22px; color: var(--accent-soft); margin-bottom: 14px; font-family: var(--font-mono); }
.hcard p:last-child { color: var(--ink-dim); font-size: 14.5px; line-height: 1.8; }

/* ---------- 图文卡(divo 风格) ---------- */
.dcards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(1.2rem, 2vw, 1.8rem);
  margin: clamp(3rem, 7vh, 5rem) 0;
}
.dcard {
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  transition: border-color 0.4s, transform 0.4s var(--ease);
}
.dcard:hover { border-color: rgba(63, 123, 255, 0.45); transform: translateY(-6px); }
.dcards--edge .dcard {
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--accent);
}
.dcards--edge .dcard:hover {
  border-color: var(--line);
  border-left-color: var(--accent);
  transform: translateY(-6px);
}
.dcard img {
  width: 100%; aspect-ratio: 16/11; object-fit: cover;
  filter: saturate(.92);
  transition: transform 1.1s var(--ease), filter .5s;
}
.dcard:hover img { transform: scale(1.04); filter: saturate(1); }
.dcard__body { padding: 1.4rem 1.5rem 1.7rem; }
.dcard__body .no {
  font-family: var(--font-mono); font-size: 11.5px;
  letter-spacing: .34em; color: var(--ink-faint);
  text-transform: uppercase;
  display: block; margin-bottom: .5rem;
}
.dcard__body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 21px;
  letter-spacing: .02em;
  margin-bottom: .55rem;
}
.dcard__body p { color: var(--ink-dim); font-size: 14.5px; line-height: 1.8; }
.dcard__body p b { color: var(--ink); }

/* ---------- 圆圈数据卡(f80 风格,品牌蓝) ---------- */
.gauges {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
  margin: clamp(1.6rem, 4vh, 2.6rem) 0 24px;
  justify-items: center;
}
.gauge { text-align: center; position: relative; }
.gauge__svg { position: relative; width: min(190px, 100%); margin: 0 auto; }
.gauge__svg svg { display: block; width: 100%; height: auto; transform: rotate(-90deg); }
.gauge circle { fill: none; stroke-width: 7; }
.gauge__track { stroke: rgba(255, 255, 255, 0.08); }
.gauge__bar {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 527.8;
  stroke-dashoffset: 527.8;
  transition: stroke-dashoffset 2.2s var(--ease);
}
.gauge.is-on .gauge__bar { stroke-dashoffset: var(--gauge-off); }
.gauge figcaption {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.gauge figcaption b {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1;
  color: #fff;
}
.gauge figcaption b em { font-style: normal; color: var(--accent-soft); }
.gauge__unit { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); letter-spacing: 0.2em; }
.gauge__label { margin-top: 16px; font-size: 13.5px; color: var(--ink-dim); letter-spacing: 0.14em; }
.gauge__label small { display: block; margin-top: 5px; font-size: 11.5px; color: var(--ink-faint); letter-spacing: 0.08em; }

/* 序章正文:居中 + 分行排版 */
.prose--center { max-width: 56ch; margin: 0 auto; text-align: center; }
.prose--center .lead { font-size: clamp(1.35rem, 2.6vw, 1.7rem); line-height: 1.9; }
.prose--center p:not(.lead) { color: var(--ink-dim); font-size: 1.02rem; line-height: 1.9; }
.prose--center p b { color: var(--ink); }