:root {
  --bg-base: #050814;
  --bg-elevated: rgba(13, 20, 38, 0.78);
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(20, 31, 56, 0.88);
  --border-subtle: rgba(148, 163, 184, 0.16);
  --border-accent: rgba(253, 186, 116, 0.48);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --cyan: #fed7aa;
  --blue: #fdba74;
  --indigo: #fb923c;
  --emerald: #10b981;
  --amber: #f59e0b;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --shadow-glow: 0 20px 50px rgba(253, 186, 116, 0.14);
  --max-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* ====================
   Pure CSS Dynamic Background
   ==================== */
.bg-dynamic {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: radial-gradient(circle at 50% 0%, #0b1633 0%, #050814 68%);
}

.bg-grid {
  position: absolute;
  inset: -100px;
  background-image:
    linear-gradient(to right, rgba(254, 215, 170, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(254, 215, 170, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 35%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 35%, transparent 100%);
  animation: gridDrift 28s linear infinite;
}

.bg-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(85px);
  opacity: 0.36;
  will-change: transform;
}

.bg-orb-1 {
  width: 520px;
  height: 520px;
  top: -140px;
  left: -100px;
  background: radial-gradient(circle, rgba(253, 186, 116, 0.42) 0%, rgba(254, 215, 170, 0.1) 65%, transparent 100%);
  animation: orbFloatOne 18s ease-in-out infinite alternate;
}

.bg-orb-2 {
  width: 600px;
  height: 600px;
  top: 18%;
  right: -180px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.28) 0%, rgba(139, 92, 246, 0.12) 65%, transparent 100%);
  animation: orbFloatTwo 22s ease-in-out infinite alternate;
}

.bg-orb-3 {
  width: 460px;
  height: 460px;
  bottom: -140px;
  left: 28%;
  background: radial-gradient(circle, rgba(254, 215, 170, 0.25) 0%, rgba(16, 185, 129, 0.08) 65%, transparent 100%);
  animation: orbFloatThree 25s ease-in-out infinite alternate;
}

.bg-beam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(254, 215, 170, 0.65) 50%, transparent 100%);
  opacity: 0.5;
  animation: beamSweep 9s ease-in-out infinite;
}

/* ====================
   多层次动态星空与流星
   ==================== */
.bg-stars {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.star-layer {
  position: absolute;
  inset: -60px;
  background-repeat: repeat;
  will-change: opacity, transform;
}

.star-layer-1 {
  background-image:
    radial-gradient(1.2px 1.2px at 18px 24px, rgba(255, 247, 237, 0.9), transparent),
    radial-gradient(1.4px 1.4px at 74px 92px, rgba(254, 215, 170, 0.85), transparent),
    radial-gradient(1px 1px at 136px 46px, rgba(226, 232, 240, 0.75), transparent),
    radial-gradient(1.5px 1.5px at 195px 142px, rgba(253, 186, 116, 0.8), transparent),
    radial-gradient(1px 1px at 245px 68px, rgba(255, 255, 255, 0.85), transparent),
    radial-gradient(1.2px 1.2px at 290px 184px, rgba(254, 215, 170, 0.72), transparent);
  background-size: 310px 220px;
  animation: starTwinkleA 6s ease-in-out infinite alternate;
}

.star-layer-2 {
  background-image:
    radial-gradient(1.6px 1.6px at 42px 130px, rgba(255, 247, 237, 0.82), transparent),
    radial-gradient(1.2px 1.2px at 112px 18px, rgba(186, 230, 253, 0.72), transparent),
    radial-gradient(1.8px 1.8px at 182px 98px, rgba(254, 215, 170, 0.85), transparent),
    radial-gradient(1.1px 1.1px at 264px 168px, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1.5px 1.5px at 340px 54px, rgba(253, 186, 116, 0.75), transparent);
  background-size: 380px 260px;
  animation: starTwinkleB 8.5s ease-in-out infinite alternate;
}

/* 四角星芒 */
.star-cross {
  position: absolute;
  width: 18px;
  height: 18px;
  opacity: 0.4;
  animation: crossPulse 4.5s ease-in-out infinite alternate;
}

.star-cross::before,
.star-cross::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: radial-gradient(circle, #fff7ed 0%, rgba(254, 215, 170, 0.85) 38%, transparent 75%);
}

.star-cross::before {
  width: 100%;
  height: 2px;
}

.star-cross::after {
  width: 2px;
  height: 100%;
}

.star-cross.c1 { top: 14%; left: 10%; width: 20px; height: 20px; animation-duration: 4.2s; }
.star-cross.c2 { top: 22%; left: 26%; width: 14px; height: 14px; animation-duration: 5.4s; animation-delay: 1.1s; }
.star-cross.c3 { top: 11%; right: 28%; width: 22px; height: 22px; animation-duration: 4.8s; animation-delay: 0.6s; }
.star-cross.c4 { top: 32%; right: 14%; width: 16px; height: 16px; animation-duration: 6s; animation-delay: 2.2s; }
.star-cross.c5 { top: 52%; left: 7%; width: 18px; height: 18px; animation-duration: 5.1s; animation-delay: 1.7s; }
.star-cross.c6 { top: 68%; left: 22%; width: 13px; height: 13px; animation-duration: 4.6s; animation-delay: 2.9s; }
.star-cross.c7 { top: 18%; left: 52%; width: 15px; height: 15px; animation-duration: 5.8s; animation-delay: 0.9s; }

/* 六角/八角旋转星徽 */
.star-burst {
  position: absolute;
  width: 24px;
  height: 24px;
  opacity: 0.55;
  animation: burstSpin 12s linear infinite;
}

.star-burst.b1 { top: 16%; left: 19%; width: 24px; height: 24px; }
.star-burst.b2 { top: 26%; right: 20%; width: 28px; height: 28px; animation-duration: 15s; animation-direction: reverse; }
.star-burst.b3 { top: 44%; left: 14%; width: 20px; height: 20px; animation-duration: 10s; }
.star-burst.b4 { top: 62%; right: 42%; width: 22px; height: 22px; animation-duration: 14s; animation-direction: reverse; }

/* 柔光光点星尘 */
.star-orb {
  position: absolute;
  border-radius: 999px;
  background: radial-gradient(circle, #fff7ed 0%, rgba(254, 215, 170, 0.6) 45%, transparent 75%);
  animation: orbBlink 5.5s ease-in-out infinite alternate;
}

.star-orb.o1 { top: 19%; left: 36%; width: 7px; height: 7px; animation-delay: 0.3s; }
.star-orb.o2 { top: 38%; left: 6%; width: 9px; height: 9px; animation-delay: 1.4s; }
.star-orb.o3 { top: 9%; right: 12%; width: 8px; height: 8px; animation-delay: 2.1s; }
.star-orb.o4 { top: 48%; right: 8%; width: 6px; height: 6px; animation-delay: 0.8s; }
.star-orb.o5 { top: 74%; left: 11%; width: 8px; height: 8px; animation-delay: 2.7s; }
.star-orb.o6 { top: 34%; left: 64%; width: 7px; height: 7px; animation-delay: 1.9s; }

/* 流星 */
.shooting-star {
  position: absolute;
  width: 140px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255, 247, 237, 0.95) 0%, rgba(254, 215, 170, 0.55) 35%, transparent 100%);
  box-shadow: 0 0 8px rgba(254, 215, 170, 0.65);
  opacity: 0;
  transform: rotate(-32deg);
  will-change: transform, opacity;
}

.shooting-star::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: #fff7ed;
  box-shadow: 0 0 10px 2px rgba(254, 215, 170, 0.9);
}

.shooting-star.m1 {
  top: 8%;
  left: 42%;
  animation: meteorFly 9s ease-out infinite 1.2s;
}

.shooting-star.m2 {
  top: 18%;
  left: 72%;
  width: 110px;
  animation: meteorFly 12.5s ease-out infinite 5.5s;
}

.shooting-star.m3 {
  top: 32%;
  left: 28%;
  width: 125px;
  animation: meteorFly 15s ease-out infinite 9.5s;
}

@keyframes starTwinkleA {
  0% { opacity: 0.42; transform: translate3d(0, 0, 0); }
  50% { opacity: 0.85; }
  100% { opacity: 0.55; transform: translate3d(-12px, -10px, 0); }
}

@keyframes starTwinkleB {
  0% { opacity: 0.65; transform: translate3d(0, 0, 0); }
  50% { opacity: 0.35; }
  100% { opacity: 0.88; transform: translate3d(14px, -14px, 0); }
}

@keyframes crossPulse {
  0% { opacity: 0.25; transform: scale(0.78) rotate(0deg); }
  100% { opacity: 0.95; transform: scale(1.18) rotate(12deg); }
}

@keyframes burstSpin {
  0% { opacity: 0.32; transform: rotate(0deg) scale(0.85); }
  50% { opacity: 0.88; transform: rotate(180deg) scale(1.12); }
  100% { opacity: 0.32; transform: rotate(360deg) scale(0.85); }
}

@keyframes orbBlink {
  0% { opacity: 0.2; transform: scale(0.8); }
  100% { opacity: 0.9; transform: scale(1.35); }
}

@keyframes meteorFly {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(-32deg) scaleX(0.4);
  }
  4% {
    opacity: 0.95;
    transform: translate3d(-35px, 22px, 0) rotate(-32deg) scaleX(1);
  }
  18% {
    opacity: 0;
    transform: translate3d(-340px, 212px, 0) rotate(-32deg) scaleX(0.7);
  }
  100% {
    opacity: 0;
    transform: translate3d(-340px, 212px, 0) rotate(-32deg) scaleX(0.7);
  }
}

/* 大型唯美微距动态蒲公英背景 */
.bg-dandelion-wrap {
  position: absolute;
  right: -20px;
  bottom: -16px;
  width: min(1040px, 92vw);
  opacity: 0.44;
  mix-blend-mode: screen;
  mask-image: radial-gradient(ellipse 88% 90% at 62% 60%, #000 52%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 88% 90% at 62% 60%, #000 52%, transparent 100%);
  transform-origin: 76% 100%;
  animation: dandelionSway 12s ease-in-out infinite alternate;
  will-change: transform;
}

.bg-dandelion-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  object-position: right bottom;
  transform-origin: 70% 55%;
  animation: dandelionBreathe 8s ease-in-out infinite alternate;
}

.dandelion-seed {
  position: absolute;
  width: 56px;
  height: 78px;
  opacity: 0;
  shape-rendering: geometricPrecision;
  will-change: transform, opacity;
}

.dandelion-seed.seed-1 {
  right: 18%;
  bottom: 42%;
  animation: seedDriftA 14s linear infinite;
}

.dandelion-seed.seed-2 {
  right: 24%;
  bottom: 36%;
  width: 38px;
  height: 54px;
  animation: seedDriftB 17s linear infinite 2.5s;
}

.dandelion-seed.seed-3 {
  right: 14%;
  bottom: 48%;
  width: 42px;
  height: 58px;
  animation: seedDriftC 15s linear infinite 5s;
}

.dandelion-seed.seed-4 {
  right: 28%;
  bottom: 44%;
  width: 34px;
  height: 48px;
  animation: seedDriftA 19s linear infinite 7.5s;
}

.dandelion-seed.seed-5 {
  right: 20%;
  bottom: 30%;
  width: 40px;
  height: 56px;
  animation: seedDriftB 16s linear infinite 10s;
}

.dandelion-seed.seed-6 {
  right: 34%;
  bottom: 52%;
  width: 32px;
  height: 44px;
  animation: seedDriftC 18s linear infinite 12s;
}

.dandelion-seed.seed-7 {
  right: 10%;
  bottom: 38%;
  width: 36px;
  height: 50px;
  animation: seedDriftA 15.5s linear infinite 3.8s;
}

@keyframes dandelionSway {
  0% {
    transform: rotate(-2.2deg) translate3d(0, 0, 0);
  }
  50% {
    transform: rotate(1.6deg) translate3d(-8px, -4px, 0);
  }
  100% {
    transform: rotate(3.2deg) translate3d(6px, 0, 0);
  }
}

@keyframes dandelionBreathe {
  0% {
    transform: scale(0.985);
  }
  100% {
    transform: scale(1.025);
  }
}

@keyframes seedDriftA {
  0% {
    transform: translate3d(0, 0, 0) rotate(-10deg) scale(0.75);
    opacity: 0;
  }
  12% {
    opacity: 0.72;
  }
  60% {
    opacity: 0.58;
  }
  100% {
    transform: translate3d(-48vw, -46vh, 0) rotate(36deg) scale(1.05);
    opacity: 0;
  }
}

@keyframes seedDriftB {
  0% {
    transform: translate3d(0, 0, 0) rotate(8deg) scale(0.7);
    opacity: 0;
  }
  15% {
    opacity: 0.65;
  }
  65% {
    opacity: 0.48;
  }
  100% {
    transform: translate3d(-62vw, -34vh, 0) rotate(-28deg) scale(1.0);
    opacity: 0;
  }
}

@keyframes seedDriftC {
  0% {
    transform: translate3d(0, 0, 0) rotate(-6deg) scale(0.8);
    opacity: 0;
  }
  14% {
    opacity: 0.68;
  }
  62% {
    opacity: 0.5;
  }
  100% {
    transform: translate3d(-34vw, -56vh, 0) rotate(24deg) scale(0.95);
    opacity: 0;
  }
}

@keyframes gridDrift {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(56px, 56px, 0);
  }
}

@keyframes orbFloatOne {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(110px, 75px, 0) scale(1.14);
  }
}

@keyframes orbFloatTwo {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(-120px, 90px, 0) scale(1.12);
  }
}

@keyframes orbFloatThree {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(90px, -85px, 0) scale(1.16);
  }
}

@keyframes beamSweep {
  0% {
    transform: translateY(0) scaleX(0.6);
    opacity: 0;
  }
  20% {
    opacity: 0.55;
  }
  80% {
    opacity: 0.25;
  }
  100% {
    transform: translateY(65vh) scaleX(1.05);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bg-grid,
  .bg-orb,
  .bg-beam,
  .star-layer,
  .star-cross,
  .star-burst,
  .star-orb,
  .shooting-star,
  .bg-dandelion-wrap,
  .bg-dandelion-img,
  .dandelion-seed,
  .pulse-dot {
    animation: none !important;
  }
}

/* ====================
   Layout Helpers
   ==================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 76px 0;
}

.section-tight {
  padding: 52px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 44px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
  background: rgba(254, 215, 170, 0.1);
  border: 1px solid rgba(254, 215, 170, 0.32);
  margin-bottom: 14px;
}

.section-title {
  margin: 0 0 12px;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.gradient-text {
  background: linear-gradient(120deg, #fff1e6 0%, #fed7aa 48%, #fdba74 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ====================
   Buttons
   ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.96rem;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #ffedd5 0%, #fed7aa 52%, #fdba74 100%);
  color: #1f140a;
  box-shadow: 0 10px 28px rgba(253, 186, 116, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 50%, #fb923c 100%);
  box-shadow: 0 14px 34px rgba(253, 186, 116, 0.42);
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.78);
  color: var(--text-primary);
  border-color: rgba(148, 163, 184, 0.28);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: rgba(30, 41, 59, 0.85);
}

.btn-sm {
  padding: 9px 16px;
  font-size: 0.88rem;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
}

/* ====================
   Header & Top-Left Logo
   ==================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(5, 8, 20, 0.78);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 70px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid rgba(148, 163, 184, 0.28);
  flex-shrink: 0;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-name span {
  color: var(--cyan);
}

.brand-domain {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.18s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--cyan);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* ====================
   Hero Section
   ==================== */
.hero {
  padding: 68px 0 56px;
}

.hero-grid {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #6ee7b7;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--emerald);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseRing 2.2s infinite;
}

@keyframes pulseRing {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    box-shadow: 0 0 0 9px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.hero-title {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.05rem);
  font-weight: 850;
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.hero-lead {
  margin: 0 auto 28px;
  color: var(--text-secondary);
  font-size: 1.07rem;
  max-width: 700px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-bottom: 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  text-align: left;
}

.metric-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  backdrop-filter: blur(10px);
}

.metric-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ====================
   Cards & Feature Grid
   ==================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(254, 215, 170, 0.12);
  border: 1px solid rgba(254, 215, 170, 0.3);
  color: var(--cyan);
  margin-bottom: 16px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 700;
}

.card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.93rem;
}

/* ====================
   GEO Spec Table
   ==================== */
.spec-wrap {
  margin-top: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
  backdrop-filter: blur(12px);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.spec-table th,
.spec-table td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.spec-table th {
  background: rgba(15, 23, 42, 0.9);
  color: var(--cyan);
  font-weight: 700;
  white-space: nowrap;
}

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

.spec-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.spec-table td {
  color: var(--text-secondary);
}

/* ====================
   Pricing Section (Single Row / 同排)
   ==================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  backdrop-filter: blur(14px);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

.pricing-card.featured {
  background: linear-gradient(170deg, rgba(38, 25, 18, 0.9), rgba(15, 23, 42, 0.92));
  border-color: rgba(253, 186, 116, 0.6);
  box-shadow: 0 22px 54px rgba(253, 186, 116, 0.18);
}

.plan-badge {
  position: absolute;
  top: -13px;
  right: 22px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffedd5, #fdba74);
  color: #1f140a;
  box-shadow: 0 6px 16px rgba(253, 186, 116, 0.32);
}

.plan-tier {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 6px;
}

.plan-desc {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.plan-price {
  font-size: 2.35rem;
  font-weight: 850;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.plan-period {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.plan-subprice {
  font-size: 0.84rem;
  color: var(--cyan);
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-features {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 11px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.check-icon {
  color: var(--emerald);
  font-weight: 800;
  flex-shrink: 0;
}

.pricing-note {
  margin-top: 22px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ====================
   Clients & Outbound Tools
   ==================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.client-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.client-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.client-name {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 3px;
}

.client-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.ext-tag {
  font-size: 0.78rem;
  color: var(--cyan);
  border: 1px solid rgba(254, 215, 170, 0.35);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ====================
   Articles Grid
   ==================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  font-size: 0.74rem;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(254, 215, 170, 0.12);
  border: 1px solid rgba(254, 215, 170, 0.3);
  color: #fed7aa;
}

.article-card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  line-height: 1.42;
}

.article-card p {
  margin: 0 0 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  flex-grow: 1;
}

.article-card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
  color: var(--cyan);
  font-weight: 600;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

/* ====================
   Reviews Grid
   ==================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.review-stars {
  color: var(--amber);
  font-size: 0.95rem;
  letter-spacing: 2px;
}

.review-quote {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.93rem;
  flex-grow: 1;
}

.review-author {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

.author-name {
  font-weight: 700;
  color: var(--text-primary);
}

.author-role {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.plan-pill {
  font-size: 0.74rem;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

/* ====================
   Native HTML FAQ Accordion
   ==================== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--border-accent);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--cyan);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  padding-top: 14px;
}

/* ====================
   CTA Banner & Footer
   ==================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(34, 24, 18, 0.9), rgba(20, 24, 46, 0.9));
  border: 1px solid rgba(253, 186, 116, 0.4);
  border-radius: var(--radius-lg);
  padding: 44px 32px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.cta-banner h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
}

.cta-banner p {
  margin: 0 auto 24px;
  max-width: 640px;
  color: var(--text-secondary);
}

.site-footer {
  margin-top: 56px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(4, 7, 17, 0.88);
  padding: 52px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 1.2fr 1fr;
  gap: 28px;
  margin-bottom: 34px;
}

.footer-col h4 {
  margin: 0 0 14px;
  font-size: 0.96rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color 0.16s ease;
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ====================
   Article Pages
   ==================== */
.article-shell {
  padding: 44px 0 68px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.breadcrumb a:hover {
  color: var(--cyan);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 30px;
  align-items: start;
}

.article-main {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 34px;
  backdrop-filter: blur(14px);
}

.article-header {
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-header h1 {
  margin: 10px 0 14px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tldr-box {
  background: rgba(254, 215, 170, 0.08);
  border: 1px solid rgba(254, 215, 170, 0.3);
  border-left: 4px solid var(--cyan);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin-bottom: 26px;
}

.tldr-box strong {
  display: block;
  color: var(--cyan);
  margin-bottom: 6px;
  font-size: 0.94rem;
}

.tldr-box p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.article-body h2 {
  margin: 30px 0 12px;
  font-size: 1.32rem;
  color: var(--text-primary);
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
}

.article-body h3 {
  margin: 22px 0 8px;
  font-size: 1.08rem;
  color: #e2e8f0;
}

.article-body p {
  margin: 0 0 16px;
  color: var(--text-secondary);
  font-size: 0.99rem;
  line-height: 1.85;
}

.article-body ul,
.article-body ol {
  margin: 0 0 18px;
  padding-left: 22px;
  color: var(--text-secondary);
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-body a.inline-link {
  color: var(--cyan);
  border-bottom: 1px dashed rgba(254, 215, 170, 0.5);
  font-weight: 600;
}

.article-body a.inline-link:hover {
  border-bottom-style: solid;
}

.article-cta-box {
  margin: 30px 0;
  padding: 22px 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(34, 24, 18, 0.85), rgba(20, 24, 46, 0.85));
  border: 1px solid rgba(253, 186, 116, 0.36);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.article-cta-box h3 {
  margin: 0 0 4px;
  font-size: 1.08rem;
}

.article-cta-box p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-nav-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.nav-card {
  display: block;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.2s ease;
}

.nav-card:hover {
  border-color: var(--cyan);
}

.nav-card-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.nav-card-title {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text-primary);
}

.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  backdrop-filter: blur(12px);
}

.sidebar-box h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--text-primary);
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-list a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
  padding: 6px 8px;
  border-radius: 8px;
  transition: background 0.16s ease, color 0.16s ease;
}

.sidebar-list a:hover,
.sidebar-list a.current {
  background: rgba(254, 215, 170, 0.12);
  color: var(--cyan);
}

/* ====================
   Responsive Breakpoints
   ==================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .articles-grid,
  .reviews-grid,
  .clients-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .main-nav {
    display: none;
  }

  .pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(250px, 1fr));
    overflow-x: auto;
    padding-bottom: 10px;
  }
}

@media (max-width: 640px) {
  .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .features-grid,
  .articles-grid,
  .reviews-grid,
  .clients-grid,
  .article-nav-cards,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-main {
    padding: 24px 18px;
  }
}