/* ========================================
   简欣科技 · 专业咨询风格
   ======================================== */

/* ========== RESET ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: #1a1a2e; line-height: 1.7; background: #ffffff;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ========== NAV ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 1px 20px rgba(0,0,0,0.06); }
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3rem; height: 72px;
}
.nav-brand {
  display: inline-flex; align-items: center;
  padding: 4px 14px;
  text-decoration: none;
  gap: 8px;
}
.nav-brand-text {
  font-size: 1.15rem; font-weight: 800;
  background: linear-gradient(135deg, #1a1a2e, #6366f1);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
.nav-logo-img {
  height: 26px; width: auto;
  flex-shrink: 0;
  border-radius: 4px;
  background: #2a2a4a;
  padding: 3px;
}
.nav-links { display: flex; gap: 2.5rem; list-style: none; align-items: center; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500; color: #555;
  transition: color 0.2s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -6px; left: 0;
  width: 0; height: 2px; background: #1a1a2e;
  border-radius: 1px; transition: width 0.3s;
}
.nav-links a:hover { color: #1a1a2e; }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: #1a1a2e; font-weight: 600; }
.nav-links a.active::after { width: 100%; }
.nav-cta {
  padding: 10px 24px; border-radius: 10px;
  background: #1a1a2e;
  color: #fff !important; font-weight: 600; font-size: 0.85rem;
  transition: all 0.25s;
}
.nav-cta:hover { background: #2d2d4e; transform: translateY(-1px); }
.nav-cta::after { display: none !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: #333; border-radius: 2px; }

/* ========== HERO ========== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; position: relative; overflow: hidden;
  background: #0a0a1a url('../assets/zhutu.jpg') center/cover no-repeat;
  padding: 8rem 2rem 4rem;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(10,10,26,0.45);
}
.hero-content { position: relative; z-index: 2; max-width: 900px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 50px;
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9); font-size: 0.85rem; margin-bottom: 3rem;
}
.hero-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: #6366f1; }
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900;
  color: #fff; line-height: 1.15; letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}
.hero h1 .gradient {
  background: linear-gradient(135deg, #6366f1, #a78bfa, #60a5fa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem); color: rgba(255,255,255,0.8);
  max-width: 640px; margin: 0 auto 3.5rem; line-height: 1.9;
}
.hero-stats {
  display: flex; justify-content: center; gap: 4rem; flex-wrap: wrap;
  margin-bottom: 4rem;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 2.8rem; font-weight: 900; color: #fff; line-height: 1;
}
.hero-stat .num .sub { font-size: 1rem; color: rgba(255,255,255,0.7); font-weight: 500; margin-left: 2px; }
.hero-stat .label { font-size: 0.75rem; color: #fff; margin-top: 8px; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500; }
.hero-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  padding: 16px 40px; border-radius: 12px; border: none;
  background: #6366f1; color: #fff; font-size: 1rem; font-weight: 700;
  transition: all 0.3s;
}
.btn-primary:hover { background: #4f46e5; transform: translateY(-2px); }
.btn-outline {
  padding: 16px 40px; border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.15); background: transparent;
  color: #fff; font-size: 1rem; font-weight: 500;
  transition: all 0.3s;
}
.btn-outline:hover { background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.3); }

/* ========== SECTIONS ========== */
section { padding: 7rem 2rem; }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 1rem;
  color: #1a1a2e;
}
.section-title .gradient {
  background: linear-gradient(135deg, #1a1a2e, #6366f1);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.section-desc {
  font-size: 1.05rem; color: #888; max-width: 600px; line-height: 1.8; margin: 0 auto;
}

/* ========== SERVICES ========== */
.services { background: #fafbff; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.service-card {
  background: #fff; border-radius: 20px; overflow: hidden;
  border: 1px solid #eee; transition: all 0.3s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.06); }
.service-card-img { width: 100%; height: 200px; object-fit: cover; }
.service-card-body { padding: 2rem; }
.service-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.75rem; }
.service-card p { color: #666; font-size: 0.9rem; line-height: 1.8; }

/* ========== ABOUT ========== */
.about { background: #fff; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.about-text .highlight-box {
  margin-top: 2rem; padding: 2rem; border-radius: 16px;
  background: #fafbff; border-left: 3px solid #6366f1;
}
.about-text .highlight-box p { color: #444; font-size: 0.95rem; line-height: 2; }
.about-visual {
  border-radius: 24px; overflow: hidden;
  background: #0a0a1a url('../assets/about.png') center/cover no-repeat;
  min-height: 400px; display: flex; align-items: flex-end; padding: 3rem; position: relative;
}
.about-visual .stats-row { position: relative; z-index: 2; display: flex; gap: 3rem; }
.about-visual .stat-item { text-align: center; }
.about-visual .stat-num { font-size: 2.5rem; font-weight: 900; color: #fff; }
.about-visual .stat-label { font-size: 0.75rem; color: rgba(255,255,255,0.4); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.06em; }

/* ========== ADVANTAGES ========== */
.advantages { background: #fafbff; }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.adv-card {
  text-align: center; padding: 3rem 2rem; border-radius: 20px;
  background: #fff; border: 1px solid #eee; transition: all 0.3s;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.06); }
.adv-icon {
  width: 72px; height: 72px; border-radius: 18px; margin: 0 auto 1.5rem;
  display: flex; align-items: center; justify-content: center;
  background: #fafbff;
}
.adv-icon img { width: 40px; height: 40px; }
.adv-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 0.75rem; }
.adv-card p { color: #666; font-size: 0.9rem; line-height: 1.8; }

/* ========== FLOW ========== */
.flow-section { text-align: center; background: #fff; }
.flow-track {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-top: 3.5rem; flex-wrap: wrap;
}
.flow-step {
  display: flex; flex-direction: column; align-items: center; gap: 0.75rem;
  padding: 1.5rem 1.25rem;
}
.flow-circle {
  width: 52px; height: 52px; border-radius: 50%;
  background: #1a1a2e; color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem;
}
.flow-label { font-size: 0.85rem; font-weight: 600; color: #333; }
.flow-arrow { font-size: 1.5rem; color: #ddd; padding: 0 0.5rem; }

/* ========== CONTACT ========== */
.contact {
  color: #fff; padding: 7rem 2rem;
  position: relative;
  background: #0a0a1a url('../assets/yewei.png') center/cover no-repeat;
}
.contact::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(10,10,26,0.45) 0%, rgba(10,10,26,0.15) 70%);
  z-index: 0;
}
.contact > * { position: relative; z-index: 1; }
.contact-main { max-width: 1000px; margin: 0 auto; }
.contact-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800;
  margin-bottom: 0.75rem; text-align: center;
  color: #fff;
  text-shadow: 0 0 20px rgba(255,255,255,0.15);
}
.contact-subtitle {
  color: rgba(255,255,255,0.85); font-size: 1.05rem;
  margin-bottom: 3.5rem; text-align: center;
}
.contact-body {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem;
  align-items: start; text-align: left;
}
.contact-info { display: flex; flex-direction: column; gap: 1.25rem; }
.info-item {
  display: flex; align-items: flex-start; gap: 1rem;
  padding: 1.5rem 1.75rem;
  background: rgba(10,10,26,0.6);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px; transition: all 0.3s;
}
.info-item:hover { background: rgba(10,10,26,0.75); border-color: rgba(99,102,241,0.4); }
.info-icon {
  font-size: 1.5rem; flex-shrink: 0;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: rgba(99,102,241,0.1); border-radius: 12px;
}
.info-content { flex: 1; }
.info-label {
  display: block; font-size: 0.72rem; color: rgba(255,255,255,0.7);
  margin-bottom: 4px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
}
.info-content p { color: #fff; font-size: 0.95rem; font-weight: 500; }
.info-content a.phone-link { color: #a78bfa; font-weight: 600; font-size: 1.1rem; }

.contact-action {
  display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%;
}
.wechat-qr {
  margin-bottom: 1.25rem;
  text-align: center;
}
.wechat-qr img {
  width: 120px; height: 120px; border-radius: 12px;
  border: 2px solid rgba(255,255,255,0.15);
  background: #f5f5f7;
  margin: 0 auto 0.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.wechat-qr .qr-label {
  font-size: 0.8rem; color: rgba(255,255,255,0.85); font-weight: 500;
}
.call-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.75rem; padding: 20px 48px;
  background: #6366f1; border-radius: 14px; color: #fff;
  font-size: 1.15rem; font-weight: 700; transition: all 0.3s;
}
.call-btn:hover { background: #4f46e5; transform: translateY(-2px); }
.call-icon { font-size: 1.5rem; }
.action-note {
  margin-top: 1.25rem; font-size: 0.82rem;
  color: rgba(255,255,255,0.8); text-align: center;
}

/* ========== CASES TEASER ========== */
.cases-teaser { background: #fff; padding: 7rem 2rem; }
.teaser-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
  margin-top: 2.5rem;
}
.teaser-stat {
  text-align: center; padding: 2.5rem 1.5rem;
  background: #fafbff; border-radius: 16px; border: 1px solid #eee;
}
.ts-value {
  display: block; font-size: 2.5rem; font-weight: 900; color: #1a1a2e; letter-spacing: -0.03em;
}
.ts-value .ts-unit { font-size: 1.1rem; font-weight: 700; color: #6366f1; margin-left: 2px; }
.ts-label { display: block; font-size: 0.82rem; color: #999; margin-top: 8px; font-weight: 500; }
.btn-teaser {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 14px 36px; border-radius: 12px;
  background: #1a1a2e; color: #fff; font-size: 1rem; font-weight: 700;
  transition: all 0.3s;
}
.btn-teaser:hover { background: #2d2d4e; transform: translateY(-2px); }
.btn-teaser .arrow { transition: transform 0.2s; }
.btn-teaser:hover .arrow { transform: translateX(4px); }

/* ========== FOOTER ========== */
.footer {
  background: #0a0a1a; color: rgba(255,255,255,0.3);
  text-align: center; padding: 2.5rem; font-size: 0.82rem;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer a {
  color: rgba(255,255,255,0.3); text-decoration: none;
}
.footer a:hover {
  color: rgba(255,255,255,0.6); text-decoration: underline;
}

/* ========================================
   CASES PAGE — 专业咨询风格 (Pure Typography)
   ======================================== */

.cases-hero {
  background: #0a0a1a; color: #fff;
  padding: 10rem 2rem 7rem;
  text-align: center; position: relative;
}
.cases-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 40% 50%, rgba(99,102,241,0.12) 0%, transparent 60%);
}
.cases-hero > * { position: relative; z-index: 2; }
.back-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 8px 20px; border-radius: 8px;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.5); font-size: 0.85rem;
  transition: all 0.2s; margin-bottom: 2.5rem;
}
.back-link:hover { background: rgba(255,255,255,0.08); color: #fff; }
.cases-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900;
  letter-spacing: -0.04em; margin-bottom: 1rem;
}
.cases-hero h1 .gradient {
  background: linear-gradient(135deg, #6366f1, #a78bfa, #60a5fa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.cases-hero > p { color: rgba(255,255,255,0.45); font-size: 1.1rem; max-width: 560px; margin: 0 auto; line-height: 1.8; }

/* Stats Bar */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  max-width: 1000px; margin: -3rem auto 0;
  position: relative; z-index: 10; padding: 0 2rem;
  border: 1px solid #eee; border-radius: 16px; overflow: hidden; background: #fafbff;
}
.stats-bar-item {
  padding: 2.5rem 1.5rem; text-align: center;
  border-right: 1px solid #eee; transition: all 0.3s;
}
.stats-bar-item:last-child { border-right: none; }
.stats-bar-item:hover { background: #fff; }
.stats-bar-item .big-num {
  font-size: 2.8rem; font-weight: 900; color: #1a1a2e; line-height: 1; letter-spacing: -0.04em;
}
.stats-bar-item .big-num .unit { font-size: 1.3rem; font-weight: 600; color: #6366f1; margin-left: 2px; }
.stats-bar-item .big-desc {
  font-size: 0.82rem; color: #999; margin-top: 8px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* Intro */
.cases-intro {
  max-width: 680px; margin: 5rem auto 4rem; text-align: center;
  padding: 0 2rem;
}
.cases-intro p { color: #777; font-size: 1.05rem; line-height: 2; }
.cases-intro strong { color: #1a1a2e; font-weight: 700; }

/* ========== MAIN CONTENT ========== */
.cases-main { max-width: 900px; margin: 0 auto; padding: 0 2rem 6rem; }

/* ========== SINGLE CASE ========== */
.case-block {
  margin-bottom: 6rem;
  padding-bottom: 6rem;
  border-bottom: 1px solid #eee;
}
.case-block:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

/* Case number + title */
.case-label-row { display: flex; align-items: flex-start; gap: 1.5rem; margin-bottom: 2rem; }
.case-number {
  font-size: 3.5rem; font-weight: 900; line-height: 1;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  flex-shrink: 0; min-width: 60px;
}
.case-title-text { max-width: 600px; }
.case-title-text .case-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 900;
  letter-spacing: -0.03em; color: #1a1a2e; line-height: 1.2;
  margin-bottom: 0.5rem;
}
.case-title-text .case-subtitle {
  font-size: 1rem; color: #888; font-weight: 400; line-height: 1.7;
}

/* Big number callout */
.case-big-number {
  background: linear-gradient(135deg, #0a0a1a, #1a1a3e);
  border-radius: 16px; padding: 2.5rem 3rem;
  margin-bottom: 2.5rem;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 2rem;
}
.case-big-number .highlight-num {
  font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 900; color: #fff;
  line-height: 1; letter-spacing: -0.03em;
}
.case-big-number .highlight-num .bn-mu {
  font-size: 1.2rem; color: #a78bfa; font-weight: 600; margin-left: 4px;
}
.case-big-number .highlight-desc {
  font-size: 1rem; color: rgba(255,255,255,0.5); max-width: 300px; text-align: right; line-height: 1.6;
}

/* Secondary metrics row */
.case-metrics {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem; margin-bottom: 2.5rem;
}
.case-metric {
  text-align: center; padding: 1.25rem 0.75rem;
  background: #fafbff; border-radius: 12px; border: 1px solid #eee;
}
.case-metric .cm-val {
  font-size: 1.5rem; font-weight: 900; color: #1a1a2e; line-height: 1;
}
.case-metric .cm-val .cm-mu { font-size: 0.75rem; color: #6366f1; font-weight: 600; }
.case-metric .cm-lbl {
  font-size: 0.72rem; color: #999; margin-top: 6px; font-weight: 500;
}

/* Text content */
.case-full-text {
  padding: 2.5rem; border-radius: 16px;
  background: #fafbff; border: 1px solid #eee;
}
.case-full-text p { color: #555; font-size: 0.95rem; line-height: 2; margin-bottom: 0.75rem; }
.case-full-text p:last-child { margin-bottom: 0; }
.case-full-text strong { color: #1a1a2e; font-weight: 700; }

/* Phase steps */
.phase-steps { margin: 2.5rem 0; display: grid; gap: 1rem; }
.phase-step {
  display: flex; gap: 1.25rem;
  padding: 1.5rem; border-radius: 14px;
  background: #fff; border: 1px solid #eee; transition: all 0.3s;
}
.phase-step:hover { border-color: #d0d0e0; }
.phase-step .step-num {
  flex-shrink: 0; width: 40px; height: 40px;
  border-radius: 10px; background: #1a1a2e;
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1rem;
}
.phase-step .step-body h4 { font-size: 0.95rem; font-weight: 700; color: #1a1a2e; margin-bottom: 0.4rem; }
.phase-step .step-body p { color: #666; font-size: 0.88rem; line-height: 1.85; }

/* Results dark box */
.results-box {
  margin: 2.5rem 0; padding: 2.5rem;
  background: #0a0a1a; border-radius: 16px;
}
.results-box h4 {
  font-size: 1rem; font-weight: 700; color: rgba(255,255,255,0.6);
  margin-bottom: 1.5rem; letter-spacing: 0.02em;
}
.results-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem;
}
.result-item {
  text-align: center; padding: 1.25rem 0.75rem;
  background: rgba(255,255,255,0.04); border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
}
.result-item .r-val {
  font-size: 1.5rem; font-weight: 900; color: #fff; line-height: 1;
}
.result-item .r-mu { font-size: 0.75rem; color: #a78bfa; }
.result-item .r-lbl { font-size: 0.72rem; color: rgba(255,255,255,0.35); margin-top: 6px; }

/* Sub cases (天猫优品) */
.sub-cases {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 2rem;
}
.sub-case {
  padding: 2rem; border-radius: 16px;
  border: 1px solid #eee; background: #fff;
}
.sub-case h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; color: #1a1a2e; }
.sub-case .situation {
  font-size: 0.82rem; color: #999; margin: 0.75rem 0; line-height: 1.8;
  padding: 0.75rem 1rem; background: #fafbff; border-radius: 8px;
  border-left: 3px solid #ef4444;
}
.sub-case .solution {
  font-size: 0.82rem; color: #999; margin: 0.75rem 0; line-height: 1.8;
  padding: 0.75rem 1rem; background: #f0fdf4; border-radius: 8px;
  border-left: 3px solid #10b981;
}

/* Evidence appendix */
.evidence-box {
  margin-top: 2rem; padding: 2rem;
  background: #fafbff; border-radius: 16px; border: 1px solid #eee;
}
.evidence-box h4 { font-size: 0.9rem; font-weight: 700; color: #888; margin-bottom: 1.25rem; letter-spacing: 0.05em; }
.evidence-images { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.evidence-images img {
  width: 100%; height: 160px; object-fit: cover; border-radius: 10px;
  border: 1px solid #eee;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 1rem 0; border-bottom: 1px solid #eee; }
  .nav-links.show { display: flex; }
  .nav-links li { text-align: center; }
  .nav-links a { display: block; padding: 12px 2rem; }
  .hamburger { display: flex; }
  .services-grid, .adv-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-stats { gap: 2rem; }
  .flow-track { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
  .contact-body { grid-template-columns: 1fr; }
  .teaser-stats { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stats-bar-item { border-bottom: 1px solid #eee; padding: 1.5rem; }
  .stats-bar-item:nth-child(2) { border-right: none; }
  .case-big-number { flex-direction: column; text-align: center; padding: 2rem; }
  .case-big-number .highlight-desc { text-align: center; }
  .case-label-row { flex-direction: column; gap: 0.75rem; }
  .sub-cases { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .nav-inner { padding: 0 1.5rem; }
  section { padding: 4rem 1.25rem; }
  .stats-bar { grid-template-columns: 1fr 1fr; gap: 0; }
  .stats-bar-item .big-num { font-size: 2rem; }
  .case-metrics { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: 1fr 1fr; }
}

/* Animations */
.fade-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }