/* ============================================
   张文倩 AI 数字化应用作品集
   设计语言：借鉴 stardust.blue — 暖奶白 + 柔金 + 衬线
   ============================================ */

:root {
  /* 暖色底色 */
  --cream: #FFFAF5;
  --warm-white: #FDF8F3;
  --peach: #F5E6D8;
  --apricot: #E8D4C4;

  /* 金色系 */
  --gold-soft: #D4A574;
  --gold-accent: #C49A6C;
  --gold-deep: #A67C52;

  /* 薰衣草辅助 */
  --lavender: #E8E0F0;
  --lavender-soft: #F3EFF8;

  /* 文字 */
  --text-primary: #4A4A4A;
  --text-secondary: #7A7A7A;
  --text-light: #9A9A9A;
  --text-muted: #B8B8B8;

  /* 边框 */
  --border-soft: rgba(212, 165, 116, 0.2);
  --border-gold: rgba(212, 165, 116, 0.35);

  /* 字体 */
  --font-serif: 'Noto Serif SC', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

  /* 圆角 */
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 20px;
  --r-xl: 24px;
  --r-pill: 999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--text-primary);
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  z-index: 9999;
  transition: width 0.1s;
}

/* 导航 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(255, 250, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(212, 165, 116, 0.1);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-mark {
  color: var(--gold-soft);
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 400;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gold-soft);
  transition: width 0.3s ease;
}

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

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

/* 通用容器 */
.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* 通用 section */
section {
  padding: 90px 24px;
  position: relative;
}

/* 通用章节头 */
.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  font-size: 0.82rem;
  color: var(--gold-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
  font-weight: 500;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
}

/* 通用标签药丸 */
.tag-pill {
  display: inline-flex;
  align-items: center;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  padding: 8px 18px;
  border-radius: var(--r-pill);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.25s ease;
}

.tag-pill:hover {
  border-color: var(--gold-soft);
  color: var(--gold-accent);
  background: var(--cream);
}

/* 通用原则框 */
.principle-box {
  margin-top: 48px;
  padding: 20px 32px;
  background: linear-gradient(135deg, var(--lavender-soft) 0%, var(--warm-white) 100%);
  border-radius: var(--r-lg);
  border: 1px solid var(--border-soft);
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.principle-mark {
  color: var(--gold-soft);
  font-size: 1.1rem;
}

/* ============================================
   1. Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, var(--lavender-soft) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 80%, var(--peach) 0%, transparent 40%),
    radial-gradient(ellipse 50% 35% at 15% 60%, rgba(232, 224, 240, 0.6) 0%, transparent 40%),
    var(--cream);
  overflow: hidden;
}

/* 浮动装饰球 */
.hero-bg-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.deco-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
  animation: orbFloat 12s ease-in-out infinite;
}

.deco-orb-1 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(212, 165, 116, 0.35), transparent 70%);
  top: 10%;
  left: 5%;
  animation-delay: 0s;
}

.deco-orb-2 {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(232, 224, 240, 0.5), transparent 70%);
  top: 50%;
  right: 8%;
  animation-delay: -4s;
}

.deco-orb-3 {
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(245, 230, 216, 0.6), transparent 70%);
  bottom: 5%;
  left: 40%;
  animation-delay: -8s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.08); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  padding: 8px 16px;
  border-radius: var(--r-pill);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--gold-soft);
  border-radius: 50%;
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.hero-title .reveal-line {
  display: block;
  overflow: hidden;
}

.hero-title em {
  font-style: italic;
  color: var(--gold-accent);
  font-weight: 500;
}

.hero-slogan {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--gold-accent);
  font-weight: 400;
  margin-bottom: 24px;
  font-style: italic;
}

.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-contact {
  font-size: 0.95rem;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

/* Hero 右侧卡片 */
.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  background: linear-gradient(145deg, var(--warm-white) 0%, var(--cream) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  padding: 32px 28px;
  box-shadow:
    0 4px 24px rgba(212, 165, 116, 0.08),
    0 1px 3px rgba(120, 95, 70, 0.04);
  width: 100%;
  max-width: 380px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  opacity: 0.8;
}

.hc-section {
  margin-bottom: 0;
}

.hc-label {
  font-size: 0.78rem;
  color: var(--gold-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  margin-bottom: 14px;
}

.hc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hc-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hc-dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-soft);
  margin-top: 8px;
}

.hc-divider {
  height: 1px;
  background: var(--border-soft);
  margin: 22px 0;
}

.hc-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  text-align: center;
}

.hc-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hc-stat strong {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
}

.hc-stat span {
  font-size: 0.75rem;
  color: var(--text-light);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-light);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.7;
  z-index: 1;
}

.hero-scroll svg {
  animation: floatDown 2s ease-in-out infinite;
}

@keyframes floatDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ============================================
   2. 证据条
   ============================================ */
.evidence {
  background: var(--warm-white);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.evidence-card {
  background: var(--cream);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.evidence-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  opacity: 0;
  transition: opacity 0.3s;
}

.evidence-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(212, 165, 116, 0.14);
}

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

.ev-highlight {
  background: linear-gradient(135deg, var(--peach) 0%, var(--warm-white) 100%);
  border-color: var(--border-gold);
}

.ev-highlight::before {
  opacity: 1;
}

.ev-number {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--gold-accent);
  margin-bottom: 4px;
  line-height: 1.1;
}

.ev-suffix {
  font-size: 1.2rem;
  color: var(--gold-deep);
}

.ev-unit {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 500;
}

.ev-desc {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.6;
}

.ev-check {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--gold-soft);
  font-size: 0.9rem;
  opacity: 0.5;
}

/* ============================================
   3. 工作方式
   ============================================ */
.about {
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%, var(--lavender-soft) 0%, transparent 50%),
    var(--cream);
}

.workflow {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 820px;
  margin: 0 auto;
}

.workflow-step {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 28px 32px;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  transition: all 0.3s ease;
  position: relative;
}

.workflow-step::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--gold-soft), var(--lavender));
  border-radius: var(--r-xl) 0 0 var(--r-xl);
  opacity: 0;
  transition: opacity 0.3s;
}

.workflow-step:hover {
  transform: translateX(6px);
  box-shadow: 0 8px 28px rgba(212, 165, 116, 0.1);
}

.workflow-step:hover::before {
  opacity: 1;
}

.step-marker {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-accent));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(212, 165, 116, 0.25);
}

.step-body {
  flex: 1;
}

.step-body h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.step-body p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}

.step-detail {
  font-size: 0.85rem;
  color: var(--gold-accent);
  line-height: 1.6;
}

.step-tag {
  flex-shrink: 0;
  font-size: 0.78rem;
  color: var(--gold-accent);
  background: rgba(232, 180, 160, 0.12);
  border: 1px solid rgba(232, 180, 160, 0.3);
  border-radius: var(--r-pill);
  padding: 6px 14px;
  white-space: nowrap;
  align-self: center;
}

/* ============================================
   4. 能力地图
   ============================================ */
.capability {
  background: var(--warm-white);
}

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

.cap-card {
  background: linear-gradient(145deg, var(--cream) 0%, var(--warm-white) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cap-top-line {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  opacity: 0;
  transition: opacity 0.3s;
}

.cap-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(212, 165, 116, 0.14);
  border-color: var(--border-gold);
}

.cap-card:hover .cap-top-line {
  opacity: 1;
}

.cap-icon {
  width: 48px;
  height: 48px;
  color: var(--gold-soft);
  margin-bottom: 16px;
}

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

.cap-number {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--gold-accent);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
  font-weight: 500;
}

.cap-card h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.cap-sub {
  font-size: 0.9rem;
  color: var(--gold-accent);
  margin-bottom: 14px;
  font-style: italic;
}

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

.cap-tags span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: rgba(232, 180, 160, 0.1);
  border: 1px solid rgba(232, 180, 160, 0.24);
  border-radius: var(--r-pill);
  padding: 3px 10px;
}

.cap-detail {
  padding-top: 14px;
  border-top: 1px solid var(--border-soft);
}

.cap-line {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.cap-key {
  color: var(--gold-accent);
  font-weight: 500;
  margin-right: 6px;
}

.cap-bottom {
  text-align: center;
  margin-top: 40px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.cap-bottom em {
  font-style: italic;
  color: var(--gold-accent);
  font-weight: 500;
}

/* ============================================
   5-7. 案例通用
   ============================================ */
.case {
  position: relative;
}

.case-deco {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

.case-header {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
  z-index: 1;
}

.case-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--gold-accent);
  background: rgba(232, 180, 160, 0.12);
  border: 1px solid rgba(232, 180, 160, 0.35);
  border-radius: var(--r-pill);
  padding: 5px 14px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.case-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.case-slogan {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--gold-accent);
  font-style: italic;
  margin-bottom: 16px;
}

.case-context {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
  padding: 14px 24px;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
}

/* 案例流程 */
.case-flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-step {
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 24px 20px;
  flex: 1;
  min-width: 140px;
  max-width: 180px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
}

.flow-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(212, 165, 116, 0.12);
  border-color: var(--border-gold);
}

.flow-num {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-accent));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 auto 12px;
  box-shadow: 0 3px 8px rgba(212, 165, 116, 0.2);
}

.flow-body h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.flow-body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.flow-arrow {
  display: flex;
  align-items: center;
  color: var(--gold-soft);
  font-size: 1.2rem;
  padding: 0 6px;
  opacity: 0.5;
}

/* 案例结果 */
.case-result {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 32px;
  background: linear-gradient(135deg, var(--cream) 0%, var(--warm-white) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.result-item {
  text-align: center;
  padding: 0 24px;
  flex: 1;
  min-width: 120px;
}

.result-value {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--gold-accent);
  margin-bottom: 4px;
  line-height: 1.1;
}

.result-small {
  font-size: 0.85rem;
  color: var(--gold-deep);
  margin-left: 2px;
}

.result-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.result-divider {
  width: 1px;
  height: 48px;
  background: var(--border-soft);
}

.case-note {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 14px 24px;
  background: var(--lavender-soft);
  border-radius: var(--r-md);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  left: 50%;
  transform: translateX(-50%);
}

.note-mark {
  color: var(--gold-soft);
}

/* ============================================
   Case 01 Deco
   ============================================ */
.case-deco {
  background:
    radial-gradient(ellipse 70% 40% at 30% 20%, rgba(245, 230, 216, 0.5) 0%, transparent 50%),
    var(--cream);
}

/* ============================================
   Case 02 Memory V1
   ============================================ */
.case-memory {
  background:
    radial-gradient(ellipse 60% 40% at 80% 30%, rgba(232, 224, 240, 0.5) 0%, transparent 50%),
    var(--warm-white);
}

.memory-risks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.risk-item {
  background: var(--cream);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 24px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: all 0.3s ease;
}

.risk-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(212, 165, 116, 0.1);
}

.risk-icon {
  font-size: 1.4rem;
  color: var(--gold-accent);
  line-height: 1;
  flex-shrink: 0;
}

.risk-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.5;
}

.risk-text span {
  font-size: 0.82rem;
  color: var(--text-light);
  font-weight: 400;
}

.memory-arrow {
  text-align: center;
  color: var(--gold-accent);
  font-size: 0.9rem;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.arrow-line {
  width: 40px;
  height: 1px;
  background: var(--gold-soft);
  opacity: 0.4;
}

.memory-mechanisms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.mech-card {
  background: linear-gradient(145deg, var(--cream) 0%, var(--warm-white) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.mech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  opacity: 0;
  transition: opacity 0.3s;
}

.mech-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(212, 165, 116, 0.12);
}

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

.mech-card-wide {
  grid-column: span 1;
  display: flex;
  align-items: center;
  gap: 16px;
  text-align: left;
}

.mech-ring {
  width: 80px;
  height: 80px;
  margin: 0 auto 14px;
  position: relative;
}

.mech-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--peach);
  stroke-width: 5;
}

.ring-fill {
  fill: none;
  stroke: var(--gold-soft);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 213.6;
  stroke-dashoffset: 213.6;
  transition: stroke-dashoffset 1.5s ease;
}

.mech-ring.animate .ring-fill {
  stroke-dashoffset: 0;
}

.ring-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gold-accent);
}

.mech-card h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.mech-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.mech-icon-large {
  width: 40px;
  height: 40px;
  color: var(--gold-soft);
  flex-shrink: 0;
}

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

/* ============================================
   Case 03 VectoLY
   ============================================ */
.case-vectorly {
  background:
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(245, 230, 216, 0.5) 0%, transparent 50%),
    var(--cream);
}

.vectorly-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.vstat {
  background: linear-gradient(145deg, var(--warm-white) 0%, var(--cream) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  padding: 32px 20px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.vstat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender));
  opacity: 0;
  transition: opacity 0.3s;
}

.vstat:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(212, 165, 116, 0.12);
}

.vstat:hover::before {
  opacity: 1;
}

.vstat-value {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--gold-accent);
  margin-bottom: 6px;
  line-height: 1.1;
}

.vstat-unit {
  font-size: 1rem;
  color: var(--gold-deep);
  margin-left: 2px;
}

.vstat-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.vectorly-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 32px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.vf-step {
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  padding: 16px 20px;
  text-align: center;
  transition: all 0.3s ease;
  flex: 1;
  min-width: 120px;
  max-width: 160px;
}

.vf-step:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(212, 165, 116, 0.1);
  border-color: var(--border-gold);
}

.vf-num {
  width: 28px;
  height: 28px;
  background: var(--peach);
  color: var(--gold-deep);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0 auto 8px;
}

.vf-body {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.vf-body strong {
  color: var(--text-primary);
  display: block;
  font-weight: 500;
  margin-bottom: 2px;
}

.vf-arrow {
  color: var(--gold-soft);
  font-size: 1rem;
  padding: 0 6px;
  opacity: 0.5;
}

.vectorly-role {
  padding: 24px 28px;
  background: linear-gradient(135deg, var(--lavender-soft) 0%, var(--warm-white) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  position: relative;
  z-index: 1;
}

.role-label {
  font-size: 0.82rem;
  color: var(--gold-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  margin-bottom: 10px;
}

.role-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================
   8. Working System
   ============================================ */
.system {
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, var(--lavender-soft) 0%, transparent 50%),
    var(--warm-white);
}

.system-tabs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.sys-tab {
  padding: 12px 28px;
  background: var(--cream);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s ease;
}

.sys-tab:hover {
  border-color: var(--gold-soft);
  color: var(--gold-accent);
}

.sys-tab.active {
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-accent));
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(212, 165, 116, 0.25);
}

.system-panel {
  display: none;
  padding: 40px 32px;
  background: var(--cream);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  text-align: center;
}

.system-panel.active {
  display: block;
  animation: panelFade 0.4s ease;
}

@keyframes panelFade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.sys-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.sys-path {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.sys-node {
  padding: 10px 20px;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-pill);
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.sys-node.sys-skip {
  background: transparent;
  border: 1.5px dashed rgba(212, 165, 116, 0.5);
  color: var(--gold-accent);
  font-size: 0.85rem;
  font-style: italic;
  position: relative;
}
.sys-node.sys-skip::after {
  content: "轻量";
  position: absolute;
  top: -10px;
  right: -8px;
  font-size: 0.65rem;
  font-style: normal;
  background: var(--peach);
  color: var(--gold-accent);
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.sys-node.sys-end {
  background: linear-gradient(135deg, var(--gold-soft), var(--gold-accent));
  color: white;
  border-color: transparent;
  box-shadow: 0 3px 10px rgba(212, 165, 116, 0.2);
}

.sys-arrow {
  color: var(--gold-soft);
  font-size: 0.9rem;
  opacity: 0.5;
}

/* ============================================
   9. Role Fit + 联系方式
   ============================================ */
.contact {
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, var(--lavender-soft) 0%, transparent 50%),
    radial-gradient(ellipse 50% 35% at 20% 30%, rgba(245, 230, 216, 0.4) 0%, transparent 40%),
    var(--cream);
}

.fit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.fit-card {
  background: linear-gradient(145deg, var(--warm-white) 0%, var(--cream) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.fit-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(212, 165, 116, 0.14);
  border-color: var(--border-gold);
}

.fit-card:hover .cap-top-line {
  opacity: 1;
}

.fit-num {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--gold-accent);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  font-weight: 500;
}

.fit-card h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.fit-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.fit-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.fit-tags span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: rgba(232, 180, 160, 0.1);
  border: 1px solid rgba(232, 180, 160, 0.24);
  border-radius: var(--r-pill);
  padding: 3px 10px;
}

/* 联系卡片 */
.contact-card {
  max-width: 520px;
  margin: 0 auto;
  padding: 40px 36px;
  background: var(--warm-white);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-xl);
  text-align: center;
  box-shadow: 0 8px 32px rgba(120, 95, 70, 0.08);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-soft), var(--lavender), var(--gold-soft));
}

.contact-name {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.contact-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.contact-pill {
  background: rgba(232, 180, 160, 0.1);
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  color: var(--text-primary);
  border: 1px solid rgba(232, 180, 160, 0.2);
}

.contact-meta {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.contact-easter {
  margin-top: 36px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-style: italic;
}

.easter-mark {
  color: var(--gold-soft);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 40px 24px;
  text-align: center;
  background: var(--warm-white);
  border-top: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.footer-mark {
  color: var(--gold-soft);
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 900px) {
  .nav { padding: 14px 20px; }
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 0.85rem; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content { text-align: center; }
  .hero-tags { justify-content: center; }
  .hero-visual { max-width: 400px; margin: 0 auto; }

  .evidence-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-grid { grid-template-columns: 1fr; }
  .memory-risks { grid-template-columns: 1fr; }
  .memory-mechanisms { grid-template-columns: repeat(2, 1fr); }
  .mech-card-wide { grid-column: span 2; }
  .vectorly-stats { grid-template-columns: 1fr; }
  .fit-grid { grid-template-columns: 1fr; }

  .case-flow { flex-direction: column; align-items: center; }
  .flow-arrow { transform: rotate(90deg); padding: 6px 0; }
  .flow-step { width: 100%; max-width: 300px; }

  .vectorly-flow { flex-direction: column; align-items: center; }
  .vf-arrow { transform: rotate(90deg); padding: 6px 0; }
  .vf-step { width: 100%; max-width: 280px; }

  .case-result { flex-direction: column; gap: 16px; }
  .result-divider { width: 100%; height: 1px; }

  section { padding: 60px 20px; }
  .workflow-step { flex-direction: column; gap: 14px; }
  .step-tag { align-self: flex-start; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .evidence-grid { grid-template-columns: 1fr; }
  .memory-mechanisms { grid-template-columns: 1fr; }
  .mech-card-wide { grid-column: span 1; }
  .hero-title { font-size: 1.8rem; }
  .section-title { font-size: 1.5rem; }
}