/* ============================================
   澄曜工作室 | ChengYao Studio - 黑金配色主题
   ============================================ */

:root {
  --gold-50: #fefce8;
  --gold-100: #fef3b2;
  --gold-200: #fde68a;
  --gold-300: #fbbf24;
  --gold-400: #d97706;
  --gold-500: #b8860b;
  --gold-600: #8b6914;
  --gold-700: #6b4f0a;
  --gold-800: #4a3608;

  --true-gold: #C9A84D;
  --light-gold: #E5C87C;
  --dark-gold: #A6893A;
  --pale-gold: #F0DFB0;
  --glow-gold: rgba(201, 168, 77, 0.3);

  --black-50: #fafafa;
  --black-100: #f5f5f5;
  --black-200: #e5e5e5;
  --black-300: #a3a3a3;
  --black-400: #737373;
  --black-500: #525252;
  --black-600: #2a2a2a;
  --black-700: #1a1a1a;
  --black-800: #0f0f0f;
  --black-900: #080808;
  --black-950: #020202;

  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif SC', 'Georgia', serif;

  --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  --max-width: 1200px;
  --nav-height: 72px;
}

/* 重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background: var(--black-950);
  color: var(--black-200);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(2, 2, 2, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(201, 168, 77, 0.08);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--true-gold), var(--dark-gold));
  color: var(--black-900);
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 900;
  border-radius: 8px;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--black-100);
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 400;
  color: var(--black-300);
  letter-spacing: 1px;
  text-transform: uppercase;
  position: relative;
  transition: var(--transition);
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--true-gold);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--true-gold);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--black-200);
  transition: var(--transition);
  border-radius: 1px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   英雄区
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--true-gold);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(201, 168, 77, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 20% 80%, rgba(201, 168, 77, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse 60% 60% at 80% 80%, rgba(201, 168, 77, 0.04) 0%, transparent 50%),
    linear-gradient(180deg, var(--black-950) 0%, var(--black-900) 50%, var(--black-950) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 900px;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--true-gold);
  border: 1px solid rgba(201, 168, 77, 0.25);
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-badge.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-title {
  margin-bottom: 24px;
}

.hero-title-cn {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  font-family: var(--font-serif);
  font-size: clamp(56px, 10vw, 120px);
  font-weight: 900;
  color: var(--black-50);
  letter-spacing: 12px;
  line-height: 1.1;
  height: clamp(60px, 11vw, 130px);
}

.hero-char {
  display: inline-block;
  opacity: 0;
  will-change: transform;
  color: var(--true-gold);
}

.hero-char-left {
  transform: translateX(-120vw) rotate(-25deg);
}

.hero-char-right {
  transform: translateX(120vw) rotate(25deg);
}

/* 碰撞后的抖动 */
.hero-char.collided {
  opacity: 1;
  transform: translateX(0) rotate(0deg);
  animation: shakeSettle 0.8s ease-out forwards;
  color: var(--true-gold);
}

@keyframes shakeSettle {
  0%   { transform: translateX(0) rotate(0deg); color: var(--light-gold); text-shadow: 0 0 40px rgba(229, 200, 124, 0.8), 0 0 80px rgba(201, 168, 77, 0.4); }
  10%  { transform: translateX(-8px) rotate(-2deg); color: var(--light-gold); text-shadow: 0 0 30px rgba(229, 200, 124, 0.6), 0 0 60px rgba(201, 168, 77, 0.3); }
  20%  { transform: translateX(7px) rotate(1.5deg); color: var(--true-gold); text-shadow: 0 0 25px rgba(201, 168, 77, 0.5), 0 0 50px rgba(201, 168, 77, 0.2); }
  30%  { transform: translateX(-6px) rotate(-1.2deg); color: var(--true-gold); text-shadow: 0 0 20px rgba(201, 168, 77, 0.4), 0 0 40px rgba(201, 168, 77, 0.15); }
  40%  { transform: translateX(5px) rotate(1deg); }
  50%  { transform: translateX(-4px) rotate(-0.7deg); }
  60%  { transform: translateX(3px) rotate(0.5deg); }
  70%  { transform: translateX(-2px) rotate(-0.3deg); }
  80%  { transform: translateX(1px) rotate(0.1deg); }
  90%  { transform: translateX(-0.5px) rotate(0deg); }
  100% { transform: translateX(0) rotate(0deg); }
}

/* 碰撞后的金色光辉 */
.hero-char.settled {
  opacity: 1;
  transform: translateX(0) rotate(0deg);
  color: var(--true-gold);
  text-shadow:
    0 0 20px rgba(201, 168, 77, 0.5),
    0 0 60px rgba(201, 168, 77, 0.2),
    0 0 100px rgba(201, 168, 77, 0.08);
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { text-shadow: 0 0 20px rgba(201, 168, 77, 0.5), 0 0 60px rgba(201, 168, 77, 0.2); color: var(--true-gold); }
  50%      { text-shadow: 0 0 35px rgba(201, 168, 77, 0.6), 0 0 80px rgba(201, 168, 77, 0.3), 0 0 120px rgba(201, 168, 77, 0.1); color: var(--light-gold); }
}

/* 火花 canvas */
.spark-canvas {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 10;
}

.hero-title-en {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: clamp(14px, 2.5vw, 28px);
  font-weight: 300;
  color: var(--black-400);
  letter-spacing: 14px;
  text-transform: uppercase;
  margin-top: 12px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-title-en.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 300;
  color: var(--black-300);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.8;
  letter-spacing: 1px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-subtitle.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-stats.visible {
  opacity: 1;
  transform: translateY(0);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: var(--true-gold);
  font-family: 'Inter', sans-serif;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 12px;
  color: var(--black-400);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--true-gold), var(--dark-gold));
  color: var(--black-900);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-bounce);
  opacity: 0;
  transform: translateY(20px);
}

.hero-cta.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(201, 168, 77, 0.3);
}

.hero-cta svg {
  transition: var(--transition);
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--true-gold), transparent);
  animation: scrollPulse 2s ease infinite;
}

/* ============================================
   通用区块
   ============================================ */
section {
  position: relative;
  padding: 120px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--true-gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  position: relative;
}

.section-tag::before,
.section-tag::after {
  content: '—';
  margin: 0 12px;
  opacity: 0.4;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  color: var(--black-50);
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.section-desc {
  font-size: 16px;
  font-weight: 300;
  color: var(--black-400);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============================================
   滚动揭示特效
   ============================================ */

/* tag: 从中心向两侧展开 + 金色闪光 */
.reveal-text[data-reveal="tag"] {
  clip-path: inset(0 50% 0 50%);
  opacity: 1;
  transition: clip-path 0.6s cubic-bezier(0.65, 0, 0.35, 1);
}
.reveal-text.revealed[data-reveal="tag"] {
  clip-path: inset(0 0% 0 0%);
  animation: tagGlow 0.8s ease 0.3s;
}
@keyframes tagGlow {
  0%   { text-shadow: none; }
  30%  { text-shadow: 0 0 12px rgba(201, 168, 77, 0.6), 0 0 24px rgba(201, 168, 77, 0.3); }
  100% { text-shadow: none; }
}

/* title: 从下方滑入 + 金色光晕 */
.reveal-text[data-reveal="title"] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-text.revealed[data-reveal="title"] {
  opacity: 1;
  transform: translateY(0);
  animation: titleGlow 1.2s ease 0.2s;
}
@keyframes titleGlow {
  0%   { text-shadow: none; }
  20%  { text-shadow: 0 0 30px rgba(201, 168, 77, 0.4), 0 0 60px rgba(201, 168, 77, 0.15); }
  100% { text-shadow: none; }
}

/* desc: 淡入 + 轻微上浮 */
.reveal-text[data-reveal="desc"] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease 0.15s, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s;
}
.reveal-text.revealed[data-reveal="desc"] {
  opacity: 1;
  transform: translateY(0);
}

/* kanji: 从模糊到清晰 + 金色渐变闪亮 */
.reveal-text[data-reveal="kanji"] {
  opacity: 0;
  filter: blur(20px);
  transform: scale(0.8);
  transition: opacity 0.8s ease, filter 1.2s ease, transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-text.revealed[data-reveal="kanji"] {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
  animation: kanjiFlash 1.5s ease 0.3s;
}
@keyframes kanjiFlash {
  0%   { filter: blur(0) brightness(1); }
  15%  { filter: blur(0) brightness(2.5); }
  30%  { filter: blur(0) brightness(1); }
  45%  { filter: blur(0) brightness(1.8); }
  60%  { filter: blur(0) brightness(1); }
  100% { filter: blur(0) brightness(1); }
}

/* fade-up: 普通上浮淡入 */
.reveal-text[data-reveal="fade-up"] {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-text.revealed[data-reveal="fade-up"] {
  opacity: 1;
  transform: translateY(0);
}

/* gold-glow: 上浮 + 金色光晕闪过 */
.reveal-text[data-reveal="gold-glow"] {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-text.revealed[data-reveal="gold-glow"] {
  opacity: 1;
  transform: translateY(0);
  animation: goldGlow 1.5s ease 0.2s;
}
@keyframes goldGlow {
  0%   { text-shadow: none; color: var(--black-300); }
  25%  { text-shadow: 0 0 20px rgba(201, 168, 77, 0.6), 0 0 40px rgba(201, 168, 77, 0.3); color: var(--light-gold); }
  60%  { text-shadow: 0 0 10px rgba(201, 168, 77, 0.2); color: var(--true-gold); }
  100% { text-shadow: none; color: var(--black-300); }
}

/* slide-right: 从左滑入 + 金色光晕 */
.reveal-text[data-reveal="slide-right"] {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s ease, transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-text.revealed[data-reveal="slide-right"] {
  opacity: 1;
  transform: translateX(0);
  animation: titleGlow 1.2s ease 0.3s;
}

/* ============================================
   创作领域
   ============================================ */
.fields {
  background: linear-gradient(180deg, var(--black-950) 0%, var(--black-900) 50%, var(--black-950) 100%);
}

.fields-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.field-card {
  position: relative;
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid rgba(201, 168, 77, 0.08);
  border-radius: 20px;
  padding: 48px 32px;
  transition: var(--transition);
  cursor: default;
  overflow: hidden;
}

.field-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--true-gold), transparent);
  opacity: 0;
  transition: var(--transition);
}

.field-card:hover {
  border-color: rgba(201, 168, 77, 0.2);
  transform: translateY(-8px);
  background: linear-gradient(135deg, rgba(201, 168, 77, 0.05), rgba(201, 168, 77, 0.02));
}

.field-card:hover::before {
  opacity: 1;
}

.field-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 24px;
  color: var(--true-gold);
}

.field-icon svg {
  width: 100%;
  height: 100%;
}

.field-number {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: rgba(201, 168, 77, 0.3);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.field-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--black-50);
  margin-bottom: 16px;
}

.field-desc {
  font-size: 14px;
  color: var(--black-400);
  line-height: 1.8;
  margin-bottom: 24px;
}

.field-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.field-count {
  font-size: 13px;
  font-weight: 500;
  color: var(--true-gold);
  letter-spacing: 1px;
}

.field-arrow {
  font-size: 18px;
  color: var(--black-500);
  transition: var(--transition);
}

.field-card:hover .field-arrow {
  color: var(--true-gold);
  transform: translateX(4px);
}

/* ============================================
   项目展示
   ============================================ */
.projects {
  background: var(--black-900);
}

.projects-filter {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--black-400);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  padding: 8px 20px;
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.filter-btn:hover {
  border-color: rgba(201, 168, 77, 0.2);
  color: var(--black-200);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--true-gold), var(--dark-gold));
  color: var(--black-900);
  border-color: var(--true-gold);
  font-weight: 600;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.project-card {
  position: relative;
  padding: 32px 28px;
  background: linear-gradient(135deg, rgba(255,255,255,0.02), transparent);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 16px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card.hidden {
  display: none;
}

.project-card.featured {
  border-color: rgba(201, 168, 77, 0.12);
  background: linear-gradient(135deg, rgba(201, 168, 77, 0.03), rgba(255,255,255,0.01));
}

.project-card:hover {
  border-color: rgba(201, 168, 77, 0.2);
  background: linear-gradient(135deg, rgba(201, 168, 77, 0.06), rgba(201, 168, 77, 0.02));
  transform: translateY(-4px);
}

.project-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--true-gold);
  letter-spacing: 1px;
  opacity: 0.7;
}

.project-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--dark-gold);
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 4px 12px;
  border: 1px solid rgba(201, 168, 77, 0.15);
  border-radius: 100px;
}

.project-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--black-50);
  margin-bottom: 10px;
}

.project-desc {
  font-size: 13px;
  color: var(--black-400);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.project-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.project-chip {
  font-size: 11px;
  font-weight: 400;
  color: var(--black-400);
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.03);
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.04);
  margin-top: auto;
}

.project-status {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  padding: 3px 10px;
  border-radius: 100px;
}

.project-status.online {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.08);
}

.project-status.dev {
  color: var(--light-gold);
  background: rgba(201, 168, 77, 0.08);
}

.project-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--true-gold);
  letter-spacing: 1px;
  transition: var(--transition);
}

.project-link:hover {
  color: var(--light-gold);
}

/* ============================================
   时间线
   ============================================ */
.timeline {
  background: linear-gradient(180deg, var(--black-950) 0%, var(--black-900) 100%);
}

.timeline-wrapper {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(201, 168, 77, 0.3), transparent);
  transform: translateX(-50%);
}

.timeline-items {
  position: relative;
}

.timeline-item {
  position: relative;
  padding: 24px 0;
  display: flex;
  justify-content: flex-end;
  width: 50%;
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
  justify-content: flex-start;
}

.timeline-dot {
  position: absolute;
  left: -6px;
  top: 32px;
  width: 12px;
  height: 12px;
  background: var(--black-950);
  border: 2px solid var(--true-gold);
  border-radius: 50%;
  z-index: 2;
  transition: var(--transition);
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -6px;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -6px;
  left: auto;
}

.timeline-item:hover .timeline-dot {
  background: var(--true-gold);
  box-shadow: 0 0 20px rgba(201, 168, 77, 0.4);
}

.timeline-content {
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 16px;
  padding: 24px 28px;
  transition: var(--transition);
  width: 90%;
}

.timeline-item:nth-child(odd) .timeline-content {
  text-align: right;
  margin-right: 20px;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-left: 20px;
}

.timeline-content:hover {
  border-color: rgba(201, 168, 77, 0.15);
  transform: translateY(-2px);
}

.timeline-year {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--true-gold);
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.timeline-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--black-50);
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--black-400);
  line-height: 1.7;
}

/* ============================================
   理念区块
   ============================================ */
.philosophy {
  background: linear-gradient(135deg, var(--black-900) 0%, var(--black-950) 100%);
  padding: 160px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.philosophy::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle 300px at 30% 50%, rgba(201, 168, 77, 0.03), transparent),
    radial-gradient(circle 300px at 70% 50%, rgba(201, 168, 77, 0.03), transparent);
  pointer-events: none;
}

.philosophy-content {
  position: relative;
  z-index: 1;
}

.philosophy-kanji {
  font-family: var(--font-serif);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 900;
  color: transparent;
  background: linear-gradient(135deg, var(--true-gold), var(--pale-gold), var(--dark-gold));
  -webkit-background-clip: text;
  background-clip: text;
  letter-spacing: 20px;
  margin-bottom: 32px;
  line-height: 1.2;
}

.philosophy-quote {
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 400;
  color: var(--black-300);
  line-height: 2;
  letter-spacing: 2px;
  font-style: normal;
  max-width: 600px;
  margin: 0 auto;
}

.philosophy-quote .reveal-text {
  display: inline-block;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.03);
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-tagline {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--black-400);
  letter-spacing: 4px;
}

.footer-bottom {
  text-align: center;
  font-size: 12px;
  color: var(--black-500);
  letter-spacing: 1px;
}

/* ============================================
   动画
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.6; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

@keyframes particleFloat {
  0% {
    opacity: 0;
    transform: translateY(0) translateX(0);
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(-100vh) translateX(50px);
  }
}

/* ============================================
   自定义滚动条
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--black-950);
}

::-webkit-scrollbar-thumb {
  background: var(--black-600);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--black-500);
}

/* ============================================
   返回顶部
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(201, 168, 77, 0.15);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(201, 168, 77, 0.3);
  color: var(--true-gold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(201, 168, 77, 0.3);
  border-color: var(--true-gold);
  transform: translateY(-4px);
  box-shadow: 0 4px 20px rgba(201, 168, 77, 0.2);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .fields-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: rgba(2, 2, 2, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 48px;
    transition: var(--transition);
    border-left: 1px solid rgba(201, 168, 77, 0.08);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .stat-number {
    font-size: 28px;
  }

  .fields-grid {
    grid-template-columns: 1fr;
  }

  .timeline-line {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    padding-left: 40px;
  }

  .timeline-item:nth-child(odd) .timeline-content,
  .timeline-item:nth-child(even) .timeline-content {
    text-align: left;
    margin: 0;
    width: 100%;
  }

  .timeline-dot,
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 14px;
    right: auto;
  }

  .philosophy-kanji {
    letter-spacing: 12px;
  }

  section {
    padding: 80px 0;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title-cn {
    letter-spacing: 6px;
  }

  .hero-char {
    margin: 0 2px;
  }

  .hero-title-en {
    letter-spacing: 6px;
  }

  .hero-subtitle {
    letter-spacing: 0.5px;
  }

  .hero-stats {
    gap: 16px;
  }

  .section-title {
    font-size: 28px;
  }

  .contact-links {
    grid-template-columns: 1fr 1fr;
  }

  .philosophy-kanji {
    letter-spacing: 8px;
  }
}