/* ===== 设计变量（浅色主题 · 设计感强） ===== */
:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --ink: #1a1c2e;
  --ink-soft: #5b5f72;
  --ink-faint: #8a8fa3;
  --line: #e7e9f2;
  --brand: #4f46e5;
  --brand-2: #7c3aed;
  --brand-soft: #eef0ff;
  --accent: #06b6d4;
  --card: #ffffff;
  --shadow: 0 10px 30px -12px rgba(31, 35, 80, 0.18);
  --shadow-lg: 0 24px 60px -20px rgba(31, 35, 80, 0.28);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1080px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-display: "Playfair Display", "Noto Serif SC", serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.grad {
  background: linear-gradient(120deg, var(--brand), var(--brand-2) 60%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== 导航（新黑黄主题） ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(12px);
  background: rgba(15, 15, 15, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s, background .3s;
}
.nav.is-scrolled { border-color: rgba(251, 255, 20, 0.25); box-shadow: 0 6px 24px -18px rgba(0,0,0,.6); }
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo { font-weight: 700; font-size: 20px; letter-spacing: .5px; color: #FBFF14; }
.nav__logo span { color: #FBFF14; }
.nav__links { display: flex; gap: 28px; }
.nav__links a {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  position: relative;
  transition: color .25s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: #FBFF14;
  transition: width .25s;
}
.nav__links a:hover { color: #FBFF14; }
.nav__links a:hover::after, .nav__links a.active::after { width: 100%; }
.nav__links a.active { color: #FBFF14; }
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav__toggle span { width: 24px; height: 2px; background: #FBFF14; border-radius: 2px; transition: .3s; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: transform .2s, box-shadow .2s, background .2s;
  cursor: pointer;
}
.btn--primary {
  color: #fff;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  box-shadow: 0 12px 26px -10px rgba(79, 70, 229, .6);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -10px rgba(79, 70, 229, .7); }
.btn--ghost { color: var(--ink); border: 1.5px solid var(--line); background: #fff; }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }

/* ===== 新版关于我 / 首屏 ===== */
.about-hero {
  background: #0F0F0F;
  color: #FBFF14;
  position: relative;
  overflow: hidden;
  display: flex;
}
.about-hero__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 24px 0;
  position: relative;
  box-sizing: border-box;
}
.about-hero__layout {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 620px;
}
.about-hero__title-block {
  position: absolute;
  top: 18vh;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  z-index: 1;
}
.about-hero__im {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
}
.about-hero__name {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5.5vw, 64px);
  font-weight: 900;
  line-height: 1;
  color: #0F0F0F;
  background: #FBFF14;
  padding: 8px 18px 10px;
  letter-spacing: 0.06em;
}
.about-hero__right {
  position: absolute;
  top: 18vh;
  right: 0;
  max-width: 390px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  text-align: right;
  z-index: 1;
}
.barcode {
  height: 52px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
}
.barcode i {
  display: block;
  background: #FBFF14;
  flex: 0 0 auto;
  height: 100%;
}
.about-hero__desc {
  color: rgba(255,255,255,0.88);
  font-size: 14px;
  line-height: 1.85;
  font-family: var(--font);
}
.desc-line { display: inline-block; }
.nowrap { white-space: nowrap; }
.about-hero__bg-text {
  font-family: var(--font-display);
  font-size: clamp(54px, 9.5vw, 132px);
  font-weight: 700;
  color: #FBFF14;
  letter-spacing: 0.08em;
  white-space: nowrap;
  line-height: 1;
  opacity: 0.95;
}
.about-hero__photo {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  z-index: 2;
  max-height: 100%;
  max-width: 58vw;
  width: auto;
  object-fit: contain;
  object-position: bottom;
  filter: grayscale(100%) contrast(1.05) brightness(1.02);
  pointer-events: none;
  user-select: none;
}
.about-hero__scroll {
  position: absolute;
  right: 24px;
  bottom: 34px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #FBFF14;
  color: #0F0F0F;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .25s, box-shadow .25s;
  z-index: 3;
  box-shadow: 0 8px 24px -6px rgba(251,255,20,.5);
}
.about-hero__scroll svg { width: 34px; height: 34px; animation: bounce 2s ease-in-out infinite; }
.about-hero__scroll:hover { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(251,255,20,.18); }
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 24px 90px;
}
.hero__inner {
  max-width: var(--maxw); margin: 0 auto; position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr auto; gap: 56px; align-items: center;
}
.hero__left { min-width: 0; }
.hero__photo {
  width: 220px; height: 260px; border-radius: var(--radius);
  background: linear-gradient(135deg, #eef0ff, #f5f3ff);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: var(--ink-faint); font-size: 15px; font-weight: 600;
  box-shadow: var(--shadow-lg);
}
.hero__photo span { line-height: 1.6; }
.hero__blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; z-index: 1; }
.hero__blob--1 { width: 460px; height: 460px; background: radial-gradient(circle, #c7d2fe, transparent 70%); top: -120px; right: -80px; }
.hero__blob--2 { width: 380px; height: 380px; background: radial-gradient(circle, #ddd6fe, transparent 70%); bottom: -140px; left: -100px; }
.hero__eyebrow {
  display: inline-block;
  font-size: 14px;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  font-weight: 600;
}
.hero__title { font-size: clamp(34px, 6vw, 60px); line-height: 1.18; font-weight: 800; letter-spacing: -0.5px; }
.hero__sub { max-width: 620px; margin: 24px 0 34px; color: var(--ink-soft); font-size: 18px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 48px; margin-top: 56px; flex-wrap: wrap; }
.stat b { display: block; font-size: 34px; font-weight: 800; background: linear-gradient(120deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { font-size: 14px; color: var(--ink-faint); }

/* ===== 通用区块 ===== */
.section { max-width: var(--maxw); margin: 0 auto; padding: 92px 24px; }
.section--alt { max-width: none; background: var(--bg-alt); }
.section--alt > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.section__head { margin-bottom: 44px; }
.section__kicker { font-size: 13px; letter-spacing: 3px; color: var(--brand); font-weight: 700; }
.section__title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin-top: 8px; letter-spacing: -0.5px; }
.section__desc { color: var(--ink-soft); margin-top: 10px; }

/* ===== 关于我 ===== */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.about__text p { color: var(--ink-soft); font-size: 17px; margin-bottom: 18px; }
.about__highlights { display: flex; flex-direction: column; gap: 18px; }
.highlight { display: flex; gap: 16px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 20px; box-shadow: var(--shadow); }
.highlight__dot { flex: 0 0 12px; height: 12px; margin-top: 7px; border-radius: 50%; background: linear-gradient(120deg, var(--brand), var(--brand-2)); }
.highlight b { font-size: 16px; }
.highlight p { color: var(--ink-soft); font-size: 14px; margin-top: 4px; }

/* ===== 能力（标尺轮播） ===== */
.ruler-section { background: #0F0F0F; color: #FBFF14; }
.ruler-section .section__kicker { color: rgba(255,255,255,0.5); }
.ruler-section .section__title { color: #fff; font-size: clamp(22px, 3vw, 30px); }
.ruler { padding: 26px 0 6px; user-select: none; }
.ruler__lines { position: relative; height: 34px; width: 100%; }
.ruler__lines i {
  position: absolute;
  bottom: 0;
  width: 2px;
  background: rgba(255,255,255,0.22);
  transform: translateX(-50%);
}
.ruler__lines--top i { bottom: auto; top: 0; }
.ruler__lines--bottom i { bottom: 0; }
.ruler__lines i.is-fifth,
.ruler__lines i.is-center { background: #FBFF14; }
.ruler__viewport {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 150px;
  display: flex;
  align-items: center;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.ruler__track {
  display: flex;
  align-items: center;
  gap: 100px;
  will-change: transform;
  transition: transform .55s cubic-bezier(.22, 1, .36, 1);
}
.ruler__track.no-anim { transition: none; }
.ruler__item {
  flex: 0 0 auto;
  width: 380px;
  box-sizing: border-box;
  padding: 0 10px;
  text-align: center;
  font-family: var(--font);
  font-size: clamp(26px, 4.4vw, 50px);
  font-weight: 800;
  letter-spacing: -0.5px;
  white-space: nowrap;
  color: rgba(255,255,255,0.42);
  background: none;
  border: 0;
  cursor: pointer;
  transform: scale(0.72);
  opacity: 0.4;
  transition: transform .45s cubic-bezier(.34, 1.56, .64, 1), opacity .45s ease, color .45s ease;
}
.ruler__item.active {
  transform: scale(1);
  opacity: 1;
  color: #FBFF14;
}
.ruler__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}
.ruler__btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1.5px solid rgba(251,255,20,0.4);
  color: #FBFF14;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.ruler__btn:hover { background: rgba(251,255,20,0.14); transform: scale(1.06); }
.ruler__btn:active { transform: scale(0.94); }
.ruler__page { font-size: 15px; color: rgba(255,255,255,0.55); display: flex; gap: 7px; align-items: center; }
.ruler__page #rulerCur { color: #FBFF14; font-weight: 700; font-size: 17px; }
.ruler__sep { opacity: 0.5; }

/* ===== 产品案例 ===== */
.cases { display: flex; flex-direction: column; gap: 28px; }
.case { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: transform .3s, box-shadow .3s; }
.case:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case__meta { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.case__tag { font-size: 12px; font-weight: 700; color: #fff; background: linear-gradient(120deg, var(--brand), var(--brand-2)); padding: 5px 12px; border-radius: 999px; }
.case__meta span:last-child { font-size: 13px; color: var(--ink-faint); }
.case__title { font-size: 24px; font-weight: 800; margin-bottom: 20px; }
.case__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; }
.case__grid > div b { display: block; font-size: 13px; letter-spacing: 1px; color: var(--brand); margin-bottom: 4px; }
.case__grid > div p { font-size: 15px; color: var(--ink-soft); }
.case__metrics { display: flex; gap: 36px; margin-top: 26px; padding-top: 22px; border-top: 1px dashed var(--line); flex-wrap: wrap; }
.case__metrics b { display: block; font-size: 26px; font-weight: 800; background: linear-gradient(120deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.case__metrics span { font-size: 13px; color: var(--ink-faint); }

/* ===== 项目（ColorChangeCards 复刻） ===== */
.projects-section { background: #0F0F0F; color: #fff; }
.projects-section .section__kicker { color: #FBFF14; }
.projects-section .section__title { color: #fff; }
.proj-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.proj-card {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 14px;
  cursor: pointer;
  background: #1a1a1a;
  box-shadow: 0 22px 50px -30px rgba(0, 0, 0, 0.9);
}
.proj-card__media {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(1) brightness(0.62);
  transform: scale(1.001);
  transition: filter 0.5s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.proj-card:hover .proj-card__media {
  filter: grayscale(0) brightness(0.92);
  transform: scale(1.08);
}
.proj-card__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0.3) 46%, rgba(0, 0, 0, 0) 76%);
}
.proj-card__content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 24px;
}
.proj-card__arrow {
  align-self: flex-end;
  width: 34px;
  height: 34px;
  color: #FBFF14;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.5s ease;
}
.proj-card:hover .proj-card__arrow { transform: rotate(-45deg); }
.proj-card__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  line-height: 1.16;
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.5s ease;
}
.proj-card:hover .proj-card__title { color: #fff; }
.proj-card__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.72);
  max-width: 96%;
}

/* 逐字上滚 */
.proj-letter {
  display: inline-block;
  height: 1.16em;
  overflow: hidden;
  vertical-align: bottom;
}
.proj-letter__inner {
  display: flex;
  flex-direction: column;
  transition: transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition-delay: calc(var(--i, 0) * 0.03s);
}
.proj-card:hover .proj-letter__inner { transform: translateY(-50%); }
.proj-letter__inner > span {
  display: block;
  height: 1.16em;
  line-height: 1.16em;
}

@media (max-width: 860px) {
  .proj-grid { grid-template-columns: 1fr; gap: 22px; }
}

/* ===== 项目 PDF 弹窗 ===== */
.pdf-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
}
.pdf-modal[hidden] { display: none; }
.pdf-modal__box {
  position: relative;
  width: min(960px, 92vw);
  height: min(88vh, 820px);
  background: #0a0a0a;
  border: 1px solid rgba(251, 255, 20, 0.4);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.9);
}
.pdf-modal__frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
.pdf-modal__close {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(251, 255, 20, 0.5);
  background: rgba(15, 15, 15, 0.85);
  color: #FBFF14;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}
.pdf-modal__close:hover {
  transform: rotate(90deg);
  background: #FBFF14;
  color: #0a0a0a;
}
@media (max-width: 860px) {
  .pdf-modal { padding: 16px; }
  .pdf-modal__box { width: 100%; height: 90vh; }
}

/* ===== 教育背景（黑底 + 校徽 + 主修课程滑轨动效） ===== */
.education-section { background: #0F0F0F; color: #fff; }
.education-section .section__title { color: #fff; }
.education-section .section__kicker { color: rgba(255, 255, 255, 0.5); }

.edu-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 64px;
  align-items: center;
  max-width: var(--maxw);
  margin: 8px auto 0;
  padding: 0 24px 8px;
}

/* 左侧：校徽 + 信息 */
.edu-left { text-align: center; }
.edu-emblem {
  margin: 0 0 22px;
  display: flex; align-items: center; justify-content: center;
}
.edu-emblem img { width: 200px; height: 200px; object-fit: contain; filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.5)); }
.edu-school { font-size: 13px; letter-spacing: 0.22em; text-transform: uppercase; color: rgba(255, 255, 255, 0.55); margin-bottom: 8px; }
.edu-major { margin: 0 0 14px; font-size: clamp(21.5px, 3vw, 29.5px); font-weight: 800; line-height: 1.2; color: #fff; }
.edu-meta { margin: 0; font-size: 16px; color: rgba(255, 255, 255, 0.82); line-height: 1.7; }
.edu-meta__sub { color: rgba(255, 255, 255, 0.5); font-size: 13px; margin-left: 4px; }

/* 右侧：主修课程 */
.edu-courses { position: relative; }
.edu-courses__head { font-size: 13px; letter-spacing: 0.22em; text-transform: uppercase; color: #FBFF14; margin-bottom: 18px; }
.edu-courses__body { position: relative; display: flex; gap: 16px; }
.edu-courses__list { list-style: none; margin: 0; padding: 0; flex: 1; display: grid; gap: 2px; }
.edu-course {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 11px 14px; border-radius: 10px;
  font-size: 16px; color: rgba(255, 255, 255, 0.72);
  transition: color 0.35s ease, background 0.35s ease, transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.edu-course__score { display: none; font-variant-numeric: tabular-nums; font-weight: 700; color: rgba(255, 255, 255, 0.6); transition: color 0.35s ease, transform 0.35s ease; }
.edu-course.is-active { color: #fff; background: rgba(251, 255, 20, 0.15); transform: translateX(4px); }
.edu-course.is-active .edu-course__score { color: #FBFF14; transform: scale(1.18); }

/* 滑轨 + 预览卡片 */
.edu-courses__aside { position: relative; width: 168px; flex: 0 0 168px; }
.edu-courses__rail { position: absolute; top: 6px; bottom: 6px; right: 10px; width: 2px; background: rgba(255, 255, 255, 0.12); border-radius: 2px; }
.edu-tick { position: absolute; right: 10px; width: 2px; height: 2px; border-radius: 2px; background: rgba(255, 255, 255, 0.28); transform: translateY(-50%) scaleY(1); transform-origin: right center; transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.3s ease; }
.edu-tick.is-active { background: #FBFF14; transform: translateY(-50%) scaleY(9); box-shadow: 0 0 10px rgba(251, 255, 20, 0.5); }
.edu-courses__card {
  position: absolute; right: 26px; top: 0;
  padding: 9px 16px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.06); border: 1.5px solid rgba(251, 255, 20, 0.7);
  box-shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.9), 0 0 18px -6px rgba(251, 255, 20, 0.35);
  opacity: 0; transform: translateY(-50%);
  transition: opacity 0.25s ease;
  pointer-events: none; will-change: top;
}
.edu-courses__card.is-open { opacity: 1; }
.edu-card__name { display: none; font-size: 12px; color: rgba(255, 255, 255, 0.7); margin-bottom: 2px; white-space: nowrap; }
.edu-card__score { display: block; font-size: 26px; font-weight: 800; color: #FBFF14; line-height: 1; font-variant-numeric: tabular-nums; }

/* ===== 荣誉奖项 ===== */
.awards-section { background: #0F0F0F; color: #FBFF14; }
.awards-section .section__title { color: #fff; }
.awards-section .section__kicker { color: rgba(255,255,255,0.5); }
.awards { position: relative; }
.award-preview {
  position: absolute;
  left: 0;
  top: 0;
  width: 280px;
  height: 180px;
  border-radius: 12px;
  overflow: hidden;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 24px 60px -20px rgba(0,0,0,0.6);
}
.award-preview.is-visible { opacity: 1; transform: scale(1); }
.award-preview__inner { position: relative; width: 100%; height: 100%; background: #1a1a1a; }
.award-preview__inner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.08);
  filter: blur(8px);
  transition: opacity 0.45s ease-out, transform 0.5s ease-out, filter 0.45s ease-out;
}
.award-preview__inner img.is-active { opacity: 1; transform: scale(1); filter: blur(0); }
.award-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  color: inherit;
  text-decoration: none;
  border-top: 1px solid rgba(255,255,255,0.16);
  transition: background 0.3s ease-out, padding 0.3s ease-out;
}
.award-item:last-child { border-bottom: 1px solid rgba(255,255,255,0.16); }
.award-item__main { flex: 1; min-width: 0; }
.award-item__title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}
.award-item__text { position: relative; }
.award-item__text::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: #FBFF14;
  transition: width 0.3s ease-out;
}
.award-item:hover .award-item__text::after { width: 100%; }
.award-item__desc {
  margin-top: 6px;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  line-height: 1.55;
  transition: color 0.3s;
}
.award-item:hover .award-item__desc { color: rgba(255,255,255,0.85); }
.award-item__year {
  font-size: 13px;
  font-family: var(--font-mono);
  color: rgba(255,255,255,0.45);
  white-space: nowrap;
  transition: color 0.3s;
}
.award-item:hover .award-item__year { color: rgba(255,255,255,0.75); }

/* ===== 联系（黑黄 + 左右布局） ===== */
.contact-section { background: #0F0F0F; color: #fff; }
.contact__wrap {
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 60px;
  align-items: center;
  max-width: var(--maxw);
  margin: 0 auto;
}
.contact__left { text-align: left; padding-left: 45px; }
.contact__title {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  color: #FBFF14;
  line-height: 1.12;
  margin: 0 0 20px;
}
.contact__title-line2 { display: inline-block; margin-top: 16px; }
.contact__lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 7px;
}
.contact__info {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.contact__link {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
}
.contact__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.contact__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
}
.contact__btn:hover { transform: translateY(-2px); }
.contact__btn--primary {
  background: #FBFF14;
  color: #0F0F0F;
  box-shadow: 0 10px 22px -10px rgba(251, 255, 20, 0.35);
}
.contact__btn--primary:hover { box-shadow: 0 14px 28px -10px rgba(251, 255, 20, 0.45); }
.contact__btn--ghost { background: #fff; color: #0F0F0F; }
.contact__right {
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact__right img {
  max-height: 340px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.5));
}
@media (max-width: 860px) {
  .contact__wrap { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .contact__left { text-align: center; padding-left: 0; }
  .contact__info { justify-content: center; }
  .contact__actions { justify-content: center; }
  .contact__right img { max-height: 220px; }
}

/* ===== 滚动进入动画 ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== 实习经历（时间线 sticky 滚动动效） ===== */
.exp-section { background: #0F0F0F; color: #fff; }
.exp-section .section__kicker { color: rgba(255, 255, 255, 0.5); }
.exp-section .section__title { color: #fff; font-size: clamp(28px, 4vw, 40px); }

.exp__track { position: relative; max-width: var(--maxw); margin: 0 auto; }

/* 竖向进度线 + 滚动填充 */
.exp__line {
  position: absolute;
  left: 31px;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  overflow: hidden;
}
.exp__line-fill {
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(to bottom, #FBFF14 0%, rgba(251, 255, 20, 0.25) 100%);
}

.exp__row {
  position: relative;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  padding: 18px 0 72px;
}
.exp__sticky {
  position: sticky;
  top: 150px;
  align-self: start;
  padding-left: 64px;
  min-height: 40px;
}
.exp__node {
  position: absolute;
  left: 24px;            /* 24 + 7 = 31，与进度线居中对齐 */
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #0F0F0F;
  border: 3px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 0 0 4px #0F0F0F;
  z-index: 2;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.exp__node.is-active {
  border-color: #FBFF14;
  box-shadow: 0 0 0 4px #0F0F0F, 0 0 16px rgba(251, 255, 20, 0.65);
}
.exp__company {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}
.exp__role {
  margin-top: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.5px;
}

.exp__content { padding-bottom: 8px; }
.exp__lead {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 22px;
}
.exp__gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 26px;
}
.exp__gallery--2 { grid-template-columns: repeat(2, 1fr); }
.exp__gallery img {
  width: 100%;
  height: 152px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #1a1a1a;
  transition: transform .35s ease, box-shadow .35s ease;
}
.exp__gallery img:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -20px rgba(0, 0, 0, 0.85);
}
/* 双图画廊：16:9 画框、圆角保留、图片填满（cover 裁切） */
.exp__gallery--2 img {
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
}

/* 实习经历分点（大圆点） */
.exp__role-date {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.5px;
}
.exp__points { list-style: none; margin: 0; padding: 0; }
.exp__point {
  display: flex;
  gap: 18px;
  padding: 2px 0 18px;
}
.exp__point:last-child { padding-bottom: 0; }
/* 九学王：仅收紧分点2（利用 AI 工具）与分点3（建立 PRD 规范）竖向间距，其余不变 */
.exp__points--jxw > li.exp__point:nth-child(2) { padding-bottom: 6px; }
.exp__points--jxw > li.exp__point:nth-child(2) .exp__point-text { margin-bottom: 10px; }
.exp__point-dot {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border-radius: 50%;
  background: #FBFF14;
  box-shadow: 0 0 0 3px rgba(251, 255, 20, 0.12);
}
.exp__point-body { flex: 1 1 auto; min-width: 0; }
.exp__point-title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
}
.exp__point-text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
}

/* ===== 响应式 ===== */
@media (max-width: 860px) {
  .about-hero { height: auto; min-height: auto; }
  .about-hero__inner { padding: 76px 20px 28px; height: auto; min-height: auto; }
  .about-hero__layout { height: auto; aspect-ratio: auto; display: flex; flex-direction: column; gap: 28px; }
  .about-hero__title-block { position: static; }
  .about-hero__right { position: static; align-items: flex-start; text-align: left; max-width: 100%; order: 3; }
  .about-hero__photo { position: static; transform: none; margin: 0 auto; max-width: 86vw; max-height: 50vh; }
  .barcode { width: 140px; height: 48px; }
  .about-hero__im { font-size: clamp(40px, 12vw, 62px); }
  .about-hero__name { font-size: clamp(36px, 11vw, 56px); padding: 8px 16px 10px; }
  .about-hero__bg-text { font-size: clamp(44px, 14vw, 92px); }
  .about-hero__scroll { position: relative; right: auto; bottom: auto; align-self: center; margin: 8px 0 0; width: 56px; height: 56px; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__photo { width: 160px; height: 190px; margin: 0 auto; }
  .award time { width: 100%; margin-left: 0; margin-top: 4px; }
  .nav__links {
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #0F0F0F;
    border-bottom: 1px solid rgba(251,255,20,.2);
    padding: 8px 24px 16px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: .25s;
  }
  .nav__links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.1); color: #fff; }
  .nav__links a::after { display: none; }
  .nav__toggle { display: flex; }
  .about, .case__grid, .edu-layout { grid-template-columns: 1fr; }
  .edu-layout { gap: 36px; }
  .edu-courses__aside { display: none; }
  .edu-courses__body { display: block; }
  .exp__line { display: none; }
  .exp__row { grid-template-columns: 1fr; gap: 14px; padding: 10px 0 42px; }
  .exp__sticky { position: static; padding-left: 0; }
  .exp__node { display: none; }
  .exp__gallery, .exp__gallery--2 { grid-template-columns: repeat(2, 1fr); }
  .exp__gallery img { height: 120px; }
  .exp__gallery--2 img { aspect-ratio: 16 / 9; height: auto; object-fit: cover; }
  .ruler__item { width: 240px; }
  .ruler__track { gap: 44px; }
  .ruler__viewport { height: 120px; }
  .hero__stats { gap: 28px; }
  .section { padding: 64px 20px; }
}