:root {
  --v7-ink: #0c0a1d;
  --v7-deep: #1e1b4b;
  --v7-mid: #4338ca;
  --v7-bright: #6366f1;
  --v7-glow: #a5b4fc;
  --v7-cyan: #22d3ee;
  --v7-text: #0f172a;
  --v7-muted: #64748b;
  --v7-surface: #ffffff;
  --v7-canvas: #f1f5f9;
  --v7-border: rgba(148, 163, 184, 0.35);
  --v7-radius: 20px;
  --v7-radius-sm: 14px;
  --v7-max: 1080px;
  --v7-header-h: 64px;
  --v7-font: "SF Pro SC", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--v7-font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--v7-text);
  background: var(--v7-canvas);
  overflow-x: hidden;
}

[id] { scroll-margin-top: calc(var(--v7-header-h) + 16px); }

/* ----- 顶栏 ----- */
.v7-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid var(--v7-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.v7-header__inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
  min-height: var(--v7-header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.v7-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--v7-text);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.v7-logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex-shrink: 0;
  display: block;
  object-fit: cover;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.12);
}

.v7-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.1rem;
}

.v7-nav a {
  color: var(--v7-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.4rem 0;
  transition: color 0.2s;
}

.v7-nav a:hover { color: var(--v7-mid); }

.v7-nav .v7-cta {
  padding: 0.55rem 1.2rem;
  background: linear-gradient(135deg, var(--v7-mid) 0%, var(--v7-bright) 50%, #7c3aed 100%);
  color: #fff !important;
  border-radius: 999px;
  font-size: 0.8125rem;
  box-shadow: 0 6px 24px rgba(79, 70, 229, 0.35);
}

.v7-nav .v7-cta:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

/* ----- 首屏全宽沉浸 ----- */
.v7-hero {
  position: relative;
  margin: 0 calc(50% - 50vw);
  width: 100vw;
  max-width: 100vw;
  padding: clamp(2.5rem, 6vw, 4rem) 1.25rem clamp(3rem, 7vw, 5rem);
  background: var(--v7-ink);
  color: #e2e8f0;
}

.v7-hero__aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.v7-hero__aurora::before {
  content: "";
  position: absolute;
  width: 140%;
  height: 80%;
  top: -30%;
  left: -20%;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.45) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(34, 211, 238, 0.18) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 100%, rgba(124, 58, 237, 0.35) 0%, transparent 55%);
  animation: v7-aurora 18s ease-in-out infinite alternate;
}

@keyframes v7-aurora {
  0% { transform: translate(0, 0) scale(1); opacity: 1; }
  100% { transform: translate(-4%, 3%) scale(1.05); opacity: 0.92; }
}

.v7-hero__grid {
  position: relative;
  z-index: 1;
  max-width: var(--v7-max);
  margin: 0 auto;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .v7-hero__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: 3rem;
  }
}

.v7-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--v7-glow);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(165, 180, 252, 0.35);
  margin-bottom: 1.1rem;
}

.v7-hero__kicker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--v7-cyan);
  box-shadow: 0 0 12px var(--v7-cyan);
}

.v7-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.65rem, 4.5vw, 2.35rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: #fff;
}

.v7-hero h1 span {
  background: linear-gradient(90deg, #c7d2fe 0%, #22d3ee 45%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.v7-hero__lead {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(226, 232, 240, 0.82);
  max-width: 36rem;
}

.v7-hero__lead strong { color: #fff; }

.v7-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-bottom: 1.75rem;
}

.v7-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}

.v7-btn--primary {
  background: #fff;
  color: var(--v7-mid);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.v7-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.35);
}

.v7-btn--ghost {
  background: transparent;
  color: #e2e8f0;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.v7-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.v7-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.v7-pills a {
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(226, 232, 240, 0.9);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.2s, border-color 0.2s;
}

.v7-pills a:hover {
  background: rgba(99, 102, 241, 0.35);
  border-color: rgba(165, 180, 252, 0.5);
}

.v7-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  max-width: 22rem;
}

@media (max-width: 420px) {
  .v7-stats { grid-template-columns: 1fr; max-width: none; }
}

.v7-stat {
  padding: 0.85rem 1rem;
  border-radius: var(--v7-radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.v7-stat__val {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff, var(--v7-glow));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.v7-stat__lbl {
  font-size: 0.6875rem;
  color: rgba(226, 232, 240, 0.55);
  margin-top: 0.2rem;
  line-height: 1.35;
}

.v7-hero__visual {
  position: relative;
  border-radius: var(--v7-radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow:
    0 0 0 1px rgba(99, 102, 241, 0.2),
    0 24px 60px rgba(0, 0, 0, 0.45),
    0 0 80px rgba(99, 102, 241, 0.15);
}

.v7-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
}

.v7-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, transparent 40%, rgba(15, 23, 42, 0.35) 100%);
  pointer-events: none;
}

/* ----- 主内容区 ----- */
.v7-main {
  max-width: var(--v7-max);
  margin: 0 auto;
  padding: 0 1.25rem 3.5rem;
}

.v7-section {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
}

.v7-section__head {
  margin-bottom: 1.5rem;
}

.v7-section__label {
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--v7-bright);
  margin-bottom: 0.35rem;
}

.v7-section h2 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.55rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--v7-text);
}

.v7-section__sub {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--v7-muted);
  max-width: 40rem;
  line-height: 1.65;
}

.v7-cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 680px) {
  .v7-cards { grid-template-columns: repeat(3, 1fr); }
}

.v7-card {
  position: relative;
  padding: 1.35rem 1.25rem 1.4rem;
  border-radius: var(--v7-radius-sm);
  background: var(--v7-surface);
  border: 1px solid var(--v7-border);
  height: 100%;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  overflow: hidden;
}

.v7-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--v7-mid), var(--v7-cyan));
  opacity: 0;
  transition: opacity 0.25s;
}

.v7-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(67, 56, 202, 0.12);
  border-color: rgba(99, 102, 241, 0.35);
}

.v7-card:hover::before { opacity: 1; }

.v7-card__icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.85rem;
  background: linear-gradient(145deg, #eef2ff, #e0e7ff);
  color: var(--v7-mid);
}

.v7-card h3 {
  margin: 0 0 0.65rem;
  font-size: 0.9375rem;
  font-weight: 800;
  color: var(--v7-text);
}

.v7-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.8125rem;
  color: var(--v7-muted);
  line-height: 1.55;
}

.v7-card li { margin-bottom: 0.35rem; }

.v7-band {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding: clamp(1.75rem, 4vw, 2.25rem);
  border-radius: var(--v7-radius);
  background: linear-gradient(135deg, rgba(238, 242, 255, 0.9) 0%, rgba(255, 255, 255, 0.95) 50%, rgba(224, 231, 255, 0.5) 100%);
  border: 1px solid rgba(165, 180, 252, 0.45);
  box-shadow: 0 16px 48px rgba(79, 70, 229, 0.08);
}

.v7-scenarios {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 1.25rem;
}

@media (min-width: 640px) {
  .v7-scenarios { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .v7-scenarios { grid-template-columns: repeat(4, 1fr); }
}

.v7-scen {
  padding: 1.15rem 1.1rem;
  border-radius: var(--v7-radius-sm);
  background: #fff;
  border: 1px solid var(--v7-border);
  transition: box-shadow 0.2s;
}

.v7-scen:hover {
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.v7-scen__tag {
  font-size: 1.35rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.v7-scen h3 {
  margin: 0 0 0.45rem;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--v7-text);
}

.v7-scen p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--v7-muted);
  line-height: 1.55;
}

.v7-why {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.v7-why li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--v7-radius-sm);
  background: #fff;
  border: 1px solid var(--v7-border);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--v7-text);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}

.v7-why li span:first-child {
  flex-shrink: 0;
  font-size: 1.1rem;
}

.v7-faq-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (min-width: 720px) {
  .v7-faq-grid { grid-template-columns: repeat(3, 1fr); }
}

.v7-faq-item {
  padding: 1.2rem 1.15rem;
  border-radius: var(--v7-radius-sm);
  background: var(--v7-surface);
  border: 1px solid var(--v7-border);
  border-left: 4px solid var(--v7-bright);
}

.v7-faq-item h3 {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--v7-text);
  line-height: 1.4;
}

.v7-faq-item p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--v7-muted);
  line-height: 1.6;
}

.v7-table-wrap {
  margin-top: 1.25rem;
  border-radius: var(--v7-radius-sm);
  overflow: hidden;
  border: 1px solid var(--v7-border);
  background: #fff;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.06);
}

.v7-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.v7-table th,
.v7-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  border-bottom: 1px solid #f1f5f9;
}

.v7-table th {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  font-weight: 800;
  color: var(--v7-mid);
}

.v7-table tbody tr:hover td { background: #fafbff; }

.v7-table tr:last-child td { border-bottom: none; }

.v7-table td:first-child { font-weight: 700; color: var(--v7-text); }

.v7-quick {
  margin-top: 2.5rem;
  padding: 1.5rem 1.35rem;
  border-radius: var(--v7-radius-sm);
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: #e2e8f0;
}

.v7-quick h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
}

.v7-quick ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.v7-quick a {
  color: var(--v7-glow);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
}

.v7-quick a:hover { color: #fff; text-decoration: underline; }

.v7-note {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.55;
}

.v7-footer {
  padding: 2rem 1.25rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--v7-muted);
  background: #fff;
  border-top: 1px solid var(--v7-border);
}

.v7-footer a {
  color: var(--v7-mid);
  font-weight: 700;
  text-decoration: none;
}

.v7-footer a:hover { text-decoration: underline; }

.v7-footer p { margin: 0.35rem 0; }

/* Inner pages */
@media (min-width: 680px) {
  .v7-cards--2 { grid-template-columns: repeat(2, 1fr); }
}