/* ============================================
   提格芬背单词 · B端门户网站样式表
   品牌色：橙色 #FF8C00 / 深橙 #E65100 / 黑 #1A1A1A
   ============================================ */

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

:root {
  --orange: #FF8C00;
  --orange-deep: #E65100;
  --orange-light: #FFF3E0;
  --orange-mid: #FFCC80;
  --black: #1A1A1A;
  --gray-dark: #333333;
  --gray: #666666;
  --gray-light: #F5F5F5;
  --white: #FFFFFF;
  --green: #2E7D32;
  --red: #C62828;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(255, 140, 0, 0.2);
  --transition: all 0.3s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Top Bar ---------- */
.top-bar {
  background: var(--orange-deep);
  color: white;
  text-align: center;
  font-size: 13px;
  padding: 8px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1001;
}

.top-bar a {
  background: white;
  color: var(--orange-deep);
  padding: 3px 12px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .top-bar span { display: none; }
}

/* ---------- Navbar ---------- */
#navbar {
  position: fixed;
  top: 36px;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: var(--transition);
}

#navbar.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.1);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 36px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--gray-dark);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--orange);
  background: var(--orange-light);
}

.nav-links .nav-cta {
  background: var(--orange);
  color: white;
  padding: 10px 20px;
  border-radius: 24px;
  font-weight: 600;
  margin-left: 8px;
}

.nav-links .nav-cta:hover {
  background: var(--orange-deep);
  color: white;
  transform: translateY(-1px);
}

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

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

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid #eee;
  z-index: 999;
  flex-direction: column;
  padding: 16px 24px;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--gray-dark);
  border-bottom: 1px solid #f0f0f0;
}

.mobile-menu a:last-child {
  background: var(--orange);
  color: white;
  border: none;
  text-align: center;
  margin-top: 8px;
  border-radius: 10px;
  font-weight: 600;
}

/* ---------- Section Base ---------- */
.section {
  padding: 96px 0;
}

.section-dark {
  background: #1A1A1A;
  color: white;
}

.section-light {
  background: #FAFAFA;
}

.section-orange {
  background: linear-gradient(135deg, #FF8C00 0%, #E65100 100%);
  color: white;
}

.section-cta {
  background: linear-gradient(135deg, #1A1A1A 0%, #333 100%);
  color: white;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--black);
  margin: 12px 0;
  line-height: 1.3;
}

.section-header p {
  font-size: 16px;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto;
}

.section-header.light h2 {
  color: white;
}

.section-header.light p {
  color: rgba(255,255,255,0.75);
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--orange-light);
  color: var(--orange-deep);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.section-tag-light {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,255,255,0.2);
  color: white;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

/* ---------- Hero Section ---------- */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: 104px;
  background: #FAFAFA;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-shapes .shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
}

.shape-1 {
  width: 600px;
  height: 600px;
  background: var(--orange);
  top: -200px;
  right: -100px;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--orange-deep);
  bottom: -100px;
  left: -50px;
}

.shape-3 {
  width: 200px;
  height: 200px;
  background: var(--orange);
  top: 40%;
  left: 40%;
}

.hero-content {
  flex: 1;
  display: flex;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  gap: 48px;
  width: 100%;
}

.hero-left {
  flex: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: white;
  border: 1px solid #FFE0B2;
  color: var(--orange-deep);
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--orange);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--black);
  margin-bottom: 16px;
}

.hero-highlight {
  color: var(--orange);
  position: relative;
}

.hero-highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--orange);
  border-radius: 2px;
  opacity: 0.3;
}

.hero-sub {
  font-size: 17px;
  color: var(--gray);
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-sub strong {
  color: var(--black);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}

.tag {
  background: white;
  border: 1.5px solid #FFE0B2;
  color: var(--orange-deep);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--orange);
  color: white;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,140,0,0.4);
}

.btn-primary:hover {
  background: var(--orange-deep);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,140,0,0.5);
}

.btn-outline {
  border: 2px solid var(--orange);
  color: var(--orange);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
}

.btn-outline:hover {
  background: var(--orange);
  color: white;
  transform: translateY(-2px);
}

.hero-right {
  flex-shrink: 0;
  width: 360px;
}

.hero-mascot {
  width: 100%;
  max-width: 360px;
  animation: float 3s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(255,140,0,0.15));
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

/* Hero Stats */
.hero-stats {
  background: white;
  border-top: 1px solid #f0f0f0;
  padding: 28px 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 40px;
}

.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--orange);
}

.stat-label {
  font-size: 13px;
  color: var(--gray);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: #eee;
}

/* ---------- Trust Bar ---------- */
.trust-bar {
  background: white;
  border-bottom: 1px solid #F0F0F0;
  padding: 20px 0;
}

.trust-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 140px;
  justify-content: center;
}

.trust-icon {
  font-size: 24px;
}

.trust-item div {
  display: flex;
  flex-direction: column;
}

.trust-item strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--black);
}

.trust-item span {
  font-size: 12px;
  color: var(--gray);
}

.trust-divider {
  width: 1px;
  height: 36px;
  background: #F0F0F0;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .trust-divider { display: none; }
  .trust-item { min-width: 40%; }
}

/* ---------- About Cards ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.about-card {
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--orange-mid);
}

.about-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--black);
}

.about-card p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
}

/* ---------- Pain Points ---------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.pain-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}

.pain-item:hover {
  background: rgba(255,140,0,0.1);
  border-color: rgba(255,140,0,0.3);
}

.pain-icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.pain-item h4 {
  font-size: 18px;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}

.pain-item p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

.pain-solution {
  text-align: center;
}

.solution-arrow {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,140,0,0.15);
  border: 1px solid rgba(255,140,0,0.3);
  padding: 16px 32px;
  border-radius: 40px;
  color: white;
  font-size: 18px;
}

.solution-arrow span {
  color: var(--orange-mid);
}

.solution-arrow strong {
  font-size: 20px;
  color: var(--orange);
}

/* ---------- Features ---------- */
.features-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: var(--transition);
}

.feature-item:hover {
  border-color: var(--orange-mid);
  box-shadow: var(--shadow-hover);
}

.feature-num {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--orange-light);
  color: var(--orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
}

.feature-badge {
  flex-shrink: 0;
  padding: 6px 16px;
  border-radius: 20px;
  color: white;
  font-size: 14px;
  font-weight: 700;
  height: fit-content;
  margin-top: 10px;
}

.feature-content {
  flex: 1;
}

.feature-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 6px;
}

.feature-content p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
}

/* ---------- Flywheel ---------- */
.flywheel-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.flywheel-center {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 320px;
}

.flywheel-core {
  width: 110px;
  height: 110px;
  background: white;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: var(--orange-deep);
  z-index: 2;
  box-shadow: 0 0 0 8px rgba(255,255,255,0.2);
  line-height: 1.4;
}

.flywheel-items {
  position: absolute;
  inset: 0;
}

.fw-item {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.fw-top   { transform: translate(-50%, calc(-50% - 120px)); }
.fw-right { transform: translate(calc(-50% + 114px), calc(-50% - 37px)); }
.fw-bottom-right { transform: translate(calc(-50% + 71px), calc(-50% + 97px)); }
.fw-bottom-left  { transform: translate(calc(-50% - 71px), calc(-50% + 97px)); }
.fw-left  { transform: translate(calc(-50% - 114px), calc(-50% - 37px)); }

.fw-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  border: 2px solid rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: white;
  font-weight: 700;
}

.fw-dot.done {
  background: white;
  color: var(--orange-deep);
  border-color: white;
}

.fw-item p {
  font-size: 12px;
  color: rgba(255,255,255,0.9);
  line-height: 1.4;
}

.flywheel-desc h3 {
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin-bottom: 20px;
}

.fw-points {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fw-point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.fw-bullet {
  color: var(--orange-mid);
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1.5;
}

.fw-point p {
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
}

/* ---------- Modes ---------- */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.mode-card {
  background: white;
  border: 1.5px solid #F0F0F0;
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.mode-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--orange-mid);
}

.mode-featured {
  border: 2px solid var(--orange);
  box-shadow: 0 8px 32px rgba(255,140,0,0.15);
}

.mode-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--orange);
  color: white;
  padding: 4px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
}

.mode-label {
  font-size: 12px;
  color: var(--orange);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.mode-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--black);
  margin-bottom: 4px;
}

.mode-sub {
  font-size: 13px;
  color: var(--gray);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid #F0F0F0;
}

.mode-points {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.mode-points li {
  font-size: 14px;
  color: var(--gray-dark);
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.mode-points li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--orange);
  font-size: 20px;
  line-height: 1.2;
}

.mode-invest {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--orange-light);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
}

.mode-invest span {
  font-size: 13px;
  color: var(--gray);
}

.mode-invest strong {
  font-size: 15px;
  color: var(--orange-deep);
}

.mode-btn {
  display: block;
  text-align: center;
  padding: 12px;
  border: 1.5px solid var(--orange);
  color: var(--orange);
  border-radius: 28px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.mode-btn:hover {
  background: var(--orange);
  color: white;
}

.mode-btn-primary {
  background: var(--orange);
  color: white;
}

.mode-btn-primary:hover {
  background: var(--orange-deep);
}

/* ---------- Support ---------- */
.support-tabs {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.support-group-title {
  font-size: 16px;
  font-weight: 700;
  padding: 14px 20px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.support-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* 5-item 上3下2 居中：第4个靠右、第5个靠左，成对居中 */
.support-items > .support-item:nth-child(4) {
  grid-column: 1;
  justify-self: end;
}
.support-items > .support-item:nth-child(5) {
  grid-column: 3;
  justify-self: start;
}

.support-item {
  display: flex;
  gap: 16px;
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: var(--transition);
}

.support-item:hover {
  border-color: var(--orange-mid);
  box-shadow: var(--shadow);
}

.support-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--orange);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.support-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.support-content p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.6;
}

/* ---------- Reasons ---------- */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.reason-card {
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.reason-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transition: var(--transition);
}

.reason-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.reason-card:hover::before {
  transform: scaleX(1);
}

.reason-highlight {
  border-color: var(--orange-mid);
  background: var(--orange-light);
}

.reason-highlight::before {
  transform: scaleX(1);
}

.reason-num {
  font-size: 28px;
  font-weight: 900;
  color: #F0F0F0;
  line-height: 1;
  margin-bottom: 8px;
}

.reason-highlight .reason-num {
  color: #FFD0A0;
}

.reason-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 8px;
}

.reason-card p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.6;
}

/* ---------- Contact Form ---------- */
.cta-wrap {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  align-items: start;
}

.cta-left {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.cta-mascot {
  width: 100%;
  max-width: 260px;
  animation: float 3s ease-in-out infinite;
}

.cta-right h2 {
  font-size: 36px;
  font-weight: 800;
  color: white;
  margin: 12px 0 12px;
}

.cta-right p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
  line-height: 1.8;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
  color: white;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.35);
}

.form-group select option {
  background: #333;
  color: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--orange);
  background: rgba(255,140,0,0.08);
}

.form-submit {
  background: var(--orange);
  color: white;
  border: none;
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  align-self: flex-start;
  box-shadow: 0 4px 16px rgba(255,140,0,0.4);
}

.form-submit:hover {
  background: var(--orange-deep);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,140,0,0.5);
}

.form-note {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ---------- Footer ---------- */
.footer {
  background: #0D0D0D;
  color: rgba(255,255,255,0.6);
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: flex;
  gap: 80px;
}

.footer-brand {
  flex: 1;
}

.footer-logo {
  height: 44px;
  object-fit: contain;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col h5 {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--orange);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  text-align: center;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

/* ---------- Float & Back Top ---------- */
.float-btn {
  position: fixed;
  bottom: 80px;
  right: 24px;
  background: var(--orange);
  color: white;
  padding: 14px 20px;
  border-radius: 28px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(255,140,0,0.4);
  z-index: 99;
  transition: var(--transition);
  animation: float-in 0.5s ease 1s both;
}

@keyframes float-in {
  from { opacity: 0; transform: translateX(80px); }
  to { opacity: 1; transform: translateX(0); }
}

.float-btn:hover {
  background: var(--orange-deep);
  transform: translateY(-2px);
}

.back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: white;
  border: 1.5px solid #E0E0E0;
  border-radius: 50%;
  color: var(--gray);
  font-size: 18px;
  cursor: pointer;
  z-index: 99;
  display: none;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.back-top:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.back-top.visible {
  display: flex;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: repeat(2, 1fr); }
  .reasons-grid { grid-template-columns: repeat(4, 1fr); }
  .hero-title { font-size: 40px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero-content {
    flex-direction: column-reverse;
    padding: 40px 20px 20px;
    gap: 24px;
    text-align: center;
  }

  .hero-right {
    width: 200px;
    margin: 0 auto;
  }

  .hero-title { font-size: 32px; }
  .hero-tags { justify-content: center; }
  .hero-btns { justify-content: center; }

  .hero-stats {
    flex-wrap: wrap;
    gap: 16px;
    padding: 20px;
  }

  .stat-item { padding: 0 16px; }
  .stat-divider { display: none; }

  .section { padding: 60px 0; }
  .section-header h2 { font-size: 26px; }

  .about-grid { grid-template-columns: 1fr 1fr; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .modes-grid { grid-template-columns: 1fr; }
  .flywheel-wrap { grid-template-columns: 1fr; gap: 32px; }
  .flywheel-center { height: 260px; }
  .reasons-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-wrap { grid-template-columns: 1fr; }
  .cta-left { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .support-items { grid-template-columns: 1fr 1fr; }
  .support-items > .support-item:nth-child(4),
  .support-items > .support-item:nth-child(5) { grid-column: auto; }
  .footer-inner { flex-direction: column; gap: 40px; }
  .footer-links { flex-wrap: wrap; gap: 32px; }
}

@media (max-width: 480px) {
  .about-grid { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .reasons-grid { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 28px; }
  .feature-item { flex-direction: column; }
  .support-items { grid-template-columns: 1fr; }
  .support-items > .support-item:nth-child(4),
  .support-items > .support-item:nth-child(5) { grid-column: auto; }
}

/* ---------- Cert Bar ---------- */
.cert-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: #FAFAFA;
  border: 1px solid #F0F0F0;
  border-radius: 12px;
  padding: 20px 32px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 28px;
  font-size: 14px;
  color: var(--gray-dark);
}

.cert-icon {
  font-size: 20px;
}

.cert-divider {
  width: 1px;
  height: 32px;
  background: #E0E0E0;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .cert-bar { flex-direction: column; gap: 16px; padding: 20px; }
  .cert-divider { display: none; }
  .cert-item { padding: 0; }
}

/* ---------- Market Data ---------- */
.market-data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.mdata-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  transition: var(--transition);
}

.mdata-card:hover {
  background: rgba(255,140,0,0.12);
  border-color: rgba(255,140,0,0.4);
  transform: translateY(-4px);
}

.mdata-primary {
  background: rgba(255,140,0,0.12);
  border-color: rgba(255,140,0,0.3);
}

.mdata-num {
  font-size: 56px;
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 10px;
}

.mdata-num span {
  font-size: 28px;
  font-weight: 700;
}

.mdata-label {
  font-size: 15px;
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  margin-bottom: 8px;
}

.mdata-sub {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.5;
}

.mdata-sub strong {
  color: var(--orange-mid);
}

@media (max-width: 768px) {
  .market-data-grid { grid-template-columns: 1fr; }
  .mdata-num { font-size: 44px; }
}

/* ---------- Policy Row ---------- */
.policy-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: rgba(255,140,0,0.08);
  border: 1px solid rgba(255,140,0,0.25);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.policy-tag {
  flex-shrink: 0;
  background: var(--orange);
  color: white;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.policy-content {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
}

.policy-content strong {
  color: var(--orange-mid);
}

@media (max-width: 768px) {
  .policy-row { flex-direction: column; }
}

/* ---------- Tech Section ---------- */
.tech-section {
  margin-top: 80px;
  padding-top: 64px;
  border-top: 1px solid #F0F0F0;
}

.tech-header {
  text-align: center;
  margin-bottom: 48px;
}

.tech-header h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--black);
  margin: 12px 0 8px;
}

.tech-header p {
  font-size: 15px;
  color: var(--gray);
}

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

.tech-card {
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: 14px;
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-deep));
  transform: scaleX(0);
  transition: var(--transition);
}

.tech-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--orange-mid);
}

.tech-card:hover::before {
  transform: scaleX(1);
}

.tech-icon {
  font-size: 40px;
  margin-bottom: 14px;
  display: block;
}

.tech-card h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 8px;
}

.tech-card p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .tech-grid { grid-template-columns: 1fr; }
}

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

.case-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 32px 28px;
  transition: var(--transition);
}

.case-card:hover {
  background: rgba(255,140,0,0.08);
  border-color: rgba(255,140,0,0.3);
  transform: translateY(-4px);
}

.case-card-featured {
  background: rgba(255,140,0,0.1);
  border-color: rgba(255,140,0,0.3);
}

.case-result {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 12px;
}

.case-num {
  font-size: 44px;
  font-weight: 900;
  color: var(--orange);
  line-height: 1;
}

.case-unit {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

.case-name {
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin-bottom: 4px;
}

.case-type {
  font-size: 12px;
  color: var(--orange-mid);
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.case-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 14px;
}

.case-desc strong {
  color: var(--orange-mid);
}

.case-quote {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  font-style: italic;
  padding-left: 12px;
  border-left: 2px solid rgba(255,140,0,0.3);
}

@media (max-width: 768px) {
  .cases-grid { grid-template-columns: 1fr; }
}

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

.team-card {
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: 16px;
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--transition);
}

.team-card:hover {
  border-color: var(--orange-mid);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.team-card-featured {
  border: 2px solid var(--orange);
  background: #FFFAF5;
}

.team-avatar {
  flex-shrink: 0;
  margin-bottom: 14px;
}

.team-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.avatar-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
}

.team-info h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 4px;
}

.team-role {
  font-size: 12px;
  color: var(--orange);
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid #F0F0F0;
  width: 100%;
}

.team-bg {
  display: flex;
  flex-direction: column;
  gap: 7px;
  width: 100%;
  text-align: left;
}

.team-bg li {
  font-size: 12px;
  color: var(--gray);
  line-height: 1.6;
  padding-left: 14px;
  position: relative;
}

.team-bg li::before {
  content: '\00B7';
  position: absolute;
  left: 0;
  color: var(--orange);
  font-size: 18px;
  line-height: 1.1;
}

.experts-bar {
  background: #FAFAFA;
  border: 1px solid #F0F0F0;
  border-radius: 12px;
  padding: 28px 32px;
}

.experts-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-dark);
  margin-bottom: 20px;
}

.experts-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.expert-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: 12px;
  padding: 18px 10px 14px;
  transition: var(--transition);
  min-height: 0;
}

.expert-item:hover {
  border-color: var(--orange-mid);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.expert-avatar {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  margin-bottom: 8px;
}

.expert-photo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 2px solid var(--orange-mid);
}

.expert-item > strong {
  font-size: 13px;
  color: var(--orange-deep);
  margin-bottom: 6px;
}

.expert-cols {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 10px;
  width: 100%;
}

.expert-duty {
  font-size: 11px;
  color: var(--gray-dark);
  font-weight: 500;
  text-align: right;
  white-space: nowrap;
}

.expert-exp {
  font-size: 11px;
  color: var(--gray);
  text-align: left;
  line-height: 1.5;
}

.expert-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.expert-info strong {
  font-size: 14px;
  color: var(--orange-deep);
  white-space: nowrap;
}

.expert-info span {
  font-size: 11px;
  color: var(--gray);
  line-height: 1.5;
}

@media (max-width: 992px) {
  .experts-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .team-grid { grid-template-columns: 1fr; }
  .experts-list { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .expert-item { padding: 14px 8px 12px; }
}

@media (max-width: 480px) {
  .experts-list { grid-template-columns: 1fr; }
}

/* ---------- Team Avatar Photo (真人头像) ---------- */
.avatar-photo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.team-card-featured .avatar-photo {
  width: 72px;
  height: 72px;
}

/* ---------- Partners ---------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.partner-card {
  background: white;
  border: 1px solid #F0F0F0;
  border-radius: 16px;
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  transition: var(--transition);
  min-height: 160px;
}

.partner-card:hover {
  border-color: var(--orange-mid);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.partner-card img {
  height: 80px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.partner-card span {
  font-size: 12px;
  color: var(--gray);
  font-weight: 500;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .partner-card {
    padding: 20px 12px;
    min-height: 120px;
    gap: 10px;
  }
  .partner-card img {
    height: 56px;
  }
}

/* ---------- Scroll Animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ---------- Counter Animation ---------- */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stat-num.counted {
  animation: countUp 0.5s ease forwards;
}