/* ==========================================================================
   Miaona.lol — Jade Pulse & Warm Obsidian Native CSS System
   100% Pure HTML5 + Native CSS | Zero External Frameworks | Zero JavaScript
   ========================================================================== */

:root {
  --bg-deep: #060d10;
  --bg-mid: #0b161b;
  --bg-card: rgba(12, 24, 29, 0.82);
  --bg-card-solid: #0d1a1f;
  --bg-card-hover: rgba(16, 33, 39, 0.94);
  --bg-glass: rgba(8, 17, 21, 0.78);

  --border: rgba(148, 184, 178, 0.16);
  --border-jade: rgba(16, 185, 129, 0.36);
  --border-amber: rgba(245, 158, 11, 0.44);

  --text-main: #edf6f5;
  --text-soft: #bfd1cf;
  --text-muted: #849e9b;

  --jade: #10b981;
  --jade-bright: #34d399;
  --jade-soft: rgba(16, 185, 129, 0.14);
  --cyan: #22d3ee;
  --cyan-soft: rgba(34, 211, 238, 0.13);
  --amber: #f59e0b;
  --amber-bright: #fbbf24;
  --amber-soft: rgba(245, 158, 11, 0.14);

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-card: 0 18px 44px -18px rgba(0, 0, 0, 0.78);
  --shadow-jade: 0 18px 48px -16px rgba(16, 185, 129, 0.28);
  --shadow-amber: 0 18px 46px -16px rgba(245, 158, 11, 0.26);

  --container: 1240px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-deep);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

/* ==========================================================================
   Pure CSS Dynamic Multi-Layer Background Stage (Zero JS, GPU Composited)
   ========================================================================== */
.bg-stage {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background: radial-gradient(circle at 20% 14%, #101b27 0%, #09121a 52%, #050a0f 100%);
}

.bg-aurora {
  position: absolute;
  inset: -25%;
  background:
    radial-gradient(ellipse 46% 38% at 18% 22%, rgba(255, 183, 197, 0.14) 0%, transparent 72%),
    radial-gradient(ellipse 44% 38% at 84% 20%, rgba(186, 230, 253, 0.15) 0%, transparent 72%),
    radial-gradient(ellipse 46% 40% at 68% 78%, rgba(216, 200, 255, 0.14) 0%, transparent 72%),
    radial-gradient(ellipse 38% 36% at 16% 80%, rgba(167, 243, 208, 0.14) 0%, transparent 72%);
  filter: blur(34px);
  animation: auroraFlow 28s ease-in-out infinite alternate;
  will-change: transform;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(216, 200, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(186, 230, 253, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 0.85) 20%, rgba(0, 0, 0, 0.1) 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, rgba(0, 0, 0, 0.85) 20%, rgba(0, 0, 0, 0.1) 85%);
  animation: gridDrift 48s linear infinite;
}

.bg-sweep {
  position: absolute;
  top: -30%;
  left: -30%;
  width: 65%;
  height: 160%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 194, 212, 0.035) 45%,
    rgba(186, 230, 253, 0.055) 50%,
    rgba(216, 200, 255, 0.035) 55%,
    transparent 100%
  );
  transform: rotate(22deg);
  animation: lightSweep 16s ease-in-out infinite;
}

.bg-orbit {
  position: absolute;
  top: -150px;
  right: -110px;
  width: 660px;
  height: 660px;
  border-radius: 50%;
  border: 1px dashed rgba(216, 200, 255, 0.18);
  animation: orbitSpin 70s linear infinite;
}

.bg-orbit::before,
.bg-orbit::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.bg-orbit::before {
  inset: 76px;
  border: 1px dashed rgba(255, 194, 212, 0.2);
  animation: orbitSpinReverse 44s linear infinite;
}

.bg-orbit::after {
  inset: 168px;
  border: 1px solid rgba(186, 230, 253, 0.16);
}

.bg-sparks {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(2.2px 2.2px at 14% 24%, rgba(255, 194, 212, 0.65) 50%, transparent 100%),
    radial-gradient(2.2px 2.2px at 38% 72%, rgba(186, 230, 253, 0.6) 50%, transparent 100%),
    radial-gradient(2.5px 2.5px at 66% 32%, rgba(254, 240, 138, 0.58) 50%, transparent 100%),
    radial-gradient(2.2px 2.2px at 84% 64%, rgba(181, 242, 220, 0.6) 50%, transparent 100%),
    radial-gradient(1.8px 1.8px at 52% 16%, rgba(255, 255, 255, 0.5) 50%, transparent 100%),
    radial-gradient(2.2px 2.2px at 26% 88%, rgba(216, 200, 255, 0.58) 50%, transparent 100%),
    radial-gradient(2.2px 2.2px at 91% 18%, rgba(254, 215, 170, 0.55) 50%, transparent 100%);
  animation: sparksFloat 18s ease-in-out infinite alternate;
}

/* Dreamy Macaron Pastel Floating Shapes */
.bg-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.shape {
  position: absolute;
  display: block;
  will-change: transform, opacity;
}

/* 1. 草莓马卡龙爱心 (Seamless Strawberry Macaron Heart) */
.shape--heart {
  filter: drop-shadow(0 0 14px rgba(255, 194, 212, 0.38));
}

.shape--heart::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: polygon(
    50% 24%, 60% 11%, 74% 6%, 89% 12%, 97% 26%, 96% 43%, 84% 62%, 50% 94%,
    16% 62%, 4% 43%, 3% 26%, 11% 12%, 26% 6%, 40% 11%
  );
  background: linear-gradient(155deg, rgba(255, 209, 220, 0.56) 0%, rgba(255, 179, 198, 0.24) 100%);
}

/* 2. 四瓣马卡龙小花 (Soft Pastel 4-Petal Blossom) */
.shape--blossom {
  filter: drop-shadow(0 0 14px rgba(216, 200, 255, 0.34));
}

.shape--blossom::before,
.shape--blossom::after {
  content: "";
  position: absolute;
  inset: 18% 0;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(224, 212, 255, 0.48), rgba(255, 209, 220, 0.26));
  border: 1px solid rgba(243, 232, 255, 0.42);
}

.shape--blossom::after {
  transform: rotate(90deg);
}

/* 3. 薄荷四叶草 (Mint Macaron Four-Leaf Clover) */
.shape--clover {
  filter: drop-shadow(0 0 14px rgba(181, 242, 220, 0.32));
}

.shape--clover::before,
.shape--clover::after {
  content: "";
  position: absolute;
  inset: 20% 0;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(181, 242, 220, 0.48), rgba(186, 230, 253, 0.24));
  border: 1px solid rgba(220, 252, 231, 0.42);
  transform: rotate(45deg);
}

.shape--clover::after {
  transform: rotate(-45deg);
}

/* 4. 海盐蓝云朵 (Fluffy Baby-Blue Macaron Cloud) */
.shape--cloud {
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(209, 238, 255, 0.46), rgba(186, 230, 253, 0.2));
  border: 1px solid rgba(224, 242, 254, 0.42);
  box-shadow: 0 6px 20px rgba(186, 230, 253, 0.18), inset 0 2px 6px rgba(255, 255, 255, 0.35);
}

.shape--cloud::before,
.shape--cloud::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(180deg, rgba(224, 242, 254, 0.5), rgba(186, 230, 253, 0.24));
}

.shape--cloud::before {
  width: 52%;
  height: 112%;
  top: -52%;
  left: 14%;
}

.shape--cloud::after {
  width: 38%;
  height: 84%;
  top: -36%;
  right: 16%;
}

/* 5. 马卡龙双环甜甜圈 (Frosted Pastel Donut + Inner Halo) */
.shape--donut {
  border-radius: 50%;
  border: 8px solid rgba(216, 200, 255, 0.32);
  background: radial-gradient(circle, transparent 48%, rgba(255, 209, 220, 0.14) 100%);
  box-shadow: 0 0 24px rgba(216, 200, 255, 0.22), inset 0 0 12px rgba(255, 255, 255, 0.22);
}

.shape--donut::before {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  border: 1.5px dashed rgba(181, 242, 220, 0.46);
}

/* 6. 柔光珍珠泡泡球 (Iridescent Macaron Bubble) */
.shape--orb {
  border-radius: 50%;
  border: 1px solid rgba(255, 228, 238, 0.42);
  background:
    radial-gradient(circle at 28% 26%, rgba(255, 255, 255, 0.68) 0%, rgba(255, 209, 220, 0.38) 28%, rgba(186, 230, 253, 0.18) 68%, transparent 100%);
  box-shadow: inset -4px -4px 14px rgba(216, 200, 255, 0.25), 0 0 22px rgba(255, 194, 212, 0.2);
}

/* 7. 圆角冰沙宝石 (Frosted Peach-Berry Squircle Gem) */
.shape--gem {
  border-radius: 30%;
  border: 1.5px solid rgba(255, 237, 213, 0.45);
  background: linear-gradient(135deg, rgba(254, 215, 170, 0.44), rgba(255, 194, 212, 0.22));
  box-shadow: inset 2px 2px 8px rgba(255, 255, 255, 0.32), 0 0 20px rgba(254, 215, 170, 0.2);
}

/* 8. 奶油柠檬弯月 (Soft Butter-Lemon Crescent) */
.shape--crescent {
  border-radius: 50%;
  box-shadow: -9px 7px 0 0 rgba(254, 240, 138, 0.42);
  filter: drop-shadow(0 0 14px rgba(254, 240, 138, 0.32));
}

/* 9. 四芒星辉 (Soft Sparkle Curve Star) */
.shape--sparkle {
  filter: drop-shadow(0 0 12px rgba(254, 240, 138, 0.38));
}

.shape--sparkle::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: polygon(50% 0%, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0% 50%, 40% 40%);
  background: linear-gradient(135deg, rgba(254, 243, 162, 0.56) 0%, rgba(255, 209, 220, 0.34) 100%);
}

/* 10. 棉花糖五角星 (Soft Glow Pastel Star5) */
.shape--star5 {
  filter: drop-shadow(0 0 12px rgba(255, 209, 220, 0.36));
}

.shape--star5::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  background: linear-gradient(145deg, rgba(254, 240, 138, 0.48) 0%, rgba(254, 215, 170, 0.28) 100%);
}

/* 11. 香芋糖霜六边形 (Pastel Lavender-Mint Hexagon) */
.shape--hex {
  filter: drop-shadow(0 0 14px rgba(216, 200, 255, 0.3));
}

.shape--hex::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: polygon(25% 4%, 75% 4%, 98% 50%, 75% 96%, 25% 96%, 2% 50%);
  background: linear-gradient(135deg, rgba(216, 200, 255, 0.42) 0%, rgba(186, 230, 253, 0.2) 100%);
}

/* 12. 落樱花瓣 (Macaron Sakura Petal) */
.shape--petal {
  border-radius: 4% 72% 48% 72%;
  border: 1px solid rgba(255, 224, 234, 0.45);
  background: linear-gradient(135deg, rgba(255, 194, 212, 0.48), rgba(254, 215, 170, 0.22));
  box-shadow: inset 1px 2px 6px rgba(255, 255, 255, 0.3), 0 0 16px rgba(255, 194, 212, 0.22);
}

/* 13. 双色糖果软胶囊 (Pastel Macaron Pill) */
.shape--pill {
  border-radius: 999px;
  border: 1.5px solid rgba(224, 242, 254, 0.42);
  background: linear-gradient(90deg, rgba(181, 242, 220, 0.42), rgba(186, 230, 253, 0.3), rgba(216, 200, 255, 0.24));
  box-shadow: inset 0 2px 5px rgba(255, 255, 255, 0.28), 0 0 18px rgba(186, 230, 253, 0.18);
}

/* 14. 奶油虚线光环 (Pastel Dashed Halo Ring) */
.shape--ring-dashed {
  border-radius: 50%;
  border: 2px dashed rgba(254, 215, 170, 0.44);
  box-shadow: 0 0 16px rgba(254, 215, 170, 0.16);
}

/* 15. 淡彩几何三角 (Pastel Mint-Sky Triangle) */
.shape--triangle {
  filter: drop-shadow(0 0 12px rgba(181, 242, 220, 0.3));
}

.shape--triangle::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: polygon(50% 4%, 4% 96%, 96% 96%);
  background: linear-gradient(160deg, rgba(181, 242, 220, 0.46) 0%, rgba(186, 230, 253, 0.2) 100%);
}

/* 16. 冰沙方糖 (Frosted Rounded Cube) */
.shape--cube {
  border-radius: 26%;
  border: 1.5px solid rgba(186, 230, 253, 0.45);
  background: linear-gradient(145deg, rgba(186, 230, 253, 0.38), rgba(216, 200, 255, 0.2));
  box-shadow: inset 2px 2px 8px rgba(255, 255, 255, 0.3), 0 0 18px rgba(186, 230, 253, 0.18);
}

/* Shape Placements & Graceful Floating Motion */
.s1  { width: 78px;  height: 28px;  top: 11%; left: 5%;   animation: shapeBobDrift 23s ease-in-out -3s infinite alternate; }
.s2  { width: 66px;  height: 66px;  top: 15%; right: 7%;  animation: shapeFloatSpin 27s ease-in-out -8s infinite alternate; }
.s3  { width: 46px;  height: 44px;  top: 28%; left: 13%;  animation: shapeBobDrift 21s ease-in-out -5s infinite alternate; }
.s4  { width: 46px;  height: 46px;  top: 8%;  left: 34%;  animation: shapePulseFloat 17s ease-in-out -2s infinite alternate; }
.s5  { width: 92px;  height: 92px;  top: 37%; right: 4%;  animation: shapeFloatSpin 30s ease-in-out -11s infinite alternate; }
.s6  { width: 58px;  height: 52px;  top: 47%; left: 4%;   animation: shapeFloatSpin 24s ease-in-out -7s infinite alternate; }
.s7  { width: 44px;  height: 44px;  top: 23%; right: 21%; animation: shapePulseFloat 19s ease-in-out -9s infinite alternate; }
.s8  { width: 62px;  height: 62px;  top: 60%; right: 9%;  animation: shapeFloatSpin 26s ease-in-out -4s infinite alternate; }
.s9  { width: 54px;  height: 54px;  top: 56%; left: 15%;  animation: shapeFloatSpin 20s ease-in-out -6s infinite alternate; }
.s10 { width: 104px; height: 28px;  top: 72%; left: 6%;   animation: shapeBobDrift 25s ease-in-out -12s infinite alternate; }
.s11 { width: 76px;  height: 68px;  top: 78%; right: 5%;  animation: shapeFloatSpin 29s ease-in-out -14s infinite alternate; }
.s12 { width: 46px;  height: 46px;  top: 13%; right: 31%; animation: shapePulseFloat 20s ease-in-out -5s infinite alternate; }
.s13 { width: 70px;  height: 70px;  top: 83%; left: 22%;  animation: shapeFloatSpin 24s ease-in-out -3s infinite alternate; }
.s14 { width: 56px;  height: 56px;  top: 66%; right: 26%; animation: shapePulseFloat 18s ease-in-out -8s infinite alternate; }
.s15 { width: 40px;  height: 40px;  top: 40%; left: 26%;  animation: shapeFloatSpin 21s ease-in-out -10s infinite alternate; }
.s16 { width: 58px;  height: 58px;  top: 87%; right: 24%; animation: shapeBobDrift 24s ease-in-out -6s infinite alternate; }

@keyframes shapeFloatSpin {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
    opacity: 0.55;
  }
  50% {
    transform: translate3d(18px, -26px, 0) rotate(140deg) scale(1.08);
    opacity: 0.9;
  }
  100% {
    transform: translate3d(-14px, 22px, 0) rotate(280deg) scale(0.94);
    opacity: 0.6;
  }
}

@keyframes shapeBobDrift {
  0% {
    transform: translate3d(0, 0, 0) rotate(-12deg);
    opacity: 0.5;
  }
  50% {
    transform: translate3d(-24px, -20px, 0) rotate(18deg);
    opacity: 0.85;
  }
  100% {
    transform: translate3d(20px, 26px, 0) rotate(-8deg);
    opacity: 0.55;
  }
}

@keyframes shapePulseFloat {
  0% {
    transform: translate3d(0, 0, 0) scale(0.92) rotate(0deg);
    opacity: 0.45;
  }
  50% {
    transform: translate3d(12px, -18px, 0) scale(1.16) rotate(45deg);
    opacity: 0.95;
  }
  100% {
    transform: translate3d(-10px, 14px, 0) scale(0.96) rotate(90deg);
    opacity: 0.52;
  }
}

@keyframes auroraFlow {
  0% {
    transform: translate3d(-2%, -1%, 0) scale(1);
  }
  50% {
    transform: translate3d(2.5%, 2%, 0) scale(1.06);
  }
  100% {
    transform: translate3d(-1.5%, 3%, 0) scale(1.02);
  }
}

@keyframes gridDrift {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 56px 56px;
  }
}

@keyframes lightSweep {
  0% {
    transform: translateX(-80%) rotate(22deg);
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 0.9;
  }
  100% {
    transform: translateX(220%) rotate(22deg);
    opacity: 0;
  }
}

@keyframes orbitSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes orbitSpinReverse {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

@keyframes sparksFloat {
  0% {
    transform: translateY(0);
    opacity: 0.55;
  }
  100% {
    transform: translateY(-28px);
    opacity: 0.95;
  }
}

@keyframes pulseDot {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.65);
  }
  50% {
    transform: scale(1.15);
    box-shadow: 0 0 0 8px rgba(52, 211, 153, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Layout Container & Common Utilities
   ========================================================================== */
.container {
  width: min(var(--container), calc(100% - 32px));
  margin-inline: auto;
}

.section {
  padding: 72px 0;
}

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

.section-header {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-jade);
  background: var(--jade-soft);
  color: var(--jade-bright);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  margin: 0 0 10px;
  font-size: clamp(1.55rem, 2.7vw, 2.2rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--text-main);
}

.section-desc {
  margin: 0;
  color: var(--text-soft);
  font-size: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #031510;
  box-shadow: 0 10px 26px -10px rgba(16, 185, 129, 0.75);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  box-shadow: 0 14px 32px -8px rgba(52, 211, 153, 0.75);
}

.btn--gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #1d1202;
  box-shadow: 0 10px 26px -10px rgba(245, 158, 11, 0.68);
}

.btn--gold:hover {
  background: linear-gradient(135deg, #fcd34d 0%, #fbbf24 100%);
  box-shadow: 0 14px 32px -8px rgba(251, 191, 36, 0.75);
}

.btn--ghost {
  background: rgba(16, 33, 39, 0.78);
  color: var(--text-main);
  border-color: var(--border-jade);
}

.btn--ghost:hover {
  background: rgba(20, 46, 52, 0.92);
  border-color: var(--jade-bright);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 0.875rem;
}

.btn--full {
  width: 100%;
}

/* ==========================================================================
   Sticky Topbar Header (Top-Left Logo)
   ========================================================================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(6, 13, 16, 0.82);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 70px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo-wrap {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 2px;
  background: linear-gradient(135deg, var(--jade-bright), var(--amber-bright));
  box-shadow: 0 0 20px -4px rgba(52, 211, 153, 0.5);
  flex-shrink: 0;
}

.brand-logo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: #0d1a1f;
}

.brand-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.01em;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--jade-bright);
  font-family: var(--font-mono);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 7px 12px;
  border-radius: var(--radius-xs);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-soft);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--jade-bright);
  background: rgba(16, 185, 129, 0.1);
}

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

@media (max-width: 980px) {
  .topbar-inner {
    flex-wrap: wrap;
    padding: 10px 0;
    gap: 10px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .nav-links a {
    white-space: nowrap;
    font-size: 0.85rem;
    padding: 6px 10px;
    background: rgba(16, 33, 39, 0.65);
    border: 1px solid var(--border);
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 58px 0 46px;
}

.hero-inner {
  max-width: 920px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-jade);
  background: rgba(16, 185, 129, 0.12);
  color: var(--jade-bright);
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--jade-bright);
  animation: pulseDot 2.2s infinite;
}

.hero-title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 3.8vw, 3.05rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-title .accent {
  background: linear-gradient(90deg, #34d399 0%, #22d3ee 52%, #fbbf24 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 auto 22px;
  max-width: 780px;
  font-size: 1.05rem;
  color: var(--text-soft);
}

.geo-callout {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-left: 4px solid var(--cyan);
  background: rgba(10, 26, 32, 0.85);
  margin: 0 auto 24px;
  max-width: 820px;
  text-align: left;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.geo-callout strong {
  color: var(--cyan);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
}

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

.kpi-box {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.kpi-num {
  display: block;
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--amber-bright);
}

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

@media (max-width: 720px) {
  .hero-kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ==========================================================================
   Pricing Section — Strictly Same Row ("所有价格要同排")
   ========================================================================== */
.pricing-scroll {
  width: 100%;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
}

.pricing-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(242px, 1fr));
  gap: 18px;
  align-items: stretch;
  min-width: 100%;
}

.tier-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 26px 20px 22px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  scroll-snap-align: start;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.tier-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-jade);
  background: var(--bg-card-hover);
}

.tier-card--featured {
  border-color: var(--border-amber);
  background: linear-gradient(175deg, rgba(20, 42, 42, 0.94) 0%, rgba(12, 24, 28, 0.94) 100%);
  box-shadow: var(--shadow-card), var(--shadow-amber);
}

.tier-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, #fbbf24, #f59e0b);
  color: #1e1202;
  font-size: 0.74rem;
  font-weight: 800;
  white-space: nowrap;
  box-shadow: 0 6px 16px -4px rgba(245, 158, 11, 0.55);
}

.tier-name {
  margin: 0 0 6px;
  font-size: 1.14rem;
  font-weight: 800;
  color: var(--text-main);
}

.tier-sub {
  margin: 0 0 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 44px;
}

.tier-price {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin-bottom: 4px;
}

.tier-currency {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--jade-bright);
}

.tier-amount {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.tier-card--featured .tier-currency,
.tier-card--featured .tier-amount {
  color: var(--amber-bright);
}

.tier-cycle {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.tier-annual {
  font-size: 0.8rem;
  color: var(--cyan);
  margin-bottom: 14px;
}

.tier-quota {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-xs);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  margin-bottom: 16px;
  font-size: 0.86rem;
}

.tier-quota strong {
  font-size: 1rem;
  color: var(--jade-bright);
  font-family: var(--font-mono);
}

.tier-features {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-soft);
}

.tier-features li {
  position: relative;
  padding-left: 19px;
}

.tier-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--jade-bright);
  font-weight: 800;
}

.pricing-note {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(12, 24, 29, 0.72);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-soft);
}

.pricing-note strong {
  color: var(--amber-bright);
}

/* ==========================================================================
   Architecture, Nodes & Clients Bento Sections
   ========================================================================== */
.bento-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.bento-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.panel {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

.panel h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  color: var(--text-main);
}

.panel p {
  margin: 0 0 14px;
  color: var(--text-soft);
  font-size: 0.94rem;
}

.inline-link {
  color: var(--jade-bright);
  font-weight: 700;
  border-bottom: 1px dashed rgba(52, 211, 153, 0.5);
}

.inline-link:hover {
  color: var(--amber-bright);
  border-bottom-color: var(--amber-bright);
}

.node-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.node-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  background: rgba(15, 32, 38, 0.9);
  border: 1px solid var(--border);
  color: var(--text-soft);
}

.node-pill--core {
  border-color: var(--border-jade);
  background: var(--jade-soft);
  color: var(--jade-bright);
  font-weight: 700;
}

.spec-list {
  margin: 0 0 16px;
  padding-left: 18px;
  color: var(--text-soft);
  font-size: 0.92rem;
  display: grid;
  gap: 8px;
}

.client-card {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.client-card:hover {
  border-color: var(--border-jade);
  transform: translateY(-3px);
}

.client-os {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.client-card h3 {
  margin: 4px 0 8px;
  font-size: 1.08rem;
}

.client-card p {
  margin: 0;
  font-size: 0.89rem;
  color: var(--text-soft);
}

.steps-strip {
  margin-top: 22px;
  padding: 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(34, 211, 238, 0.09) 55%, rgba(245, 158, 11, 0.1) 100%);
  border: 1px solid var(--border-jade);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto;
  gap: 18px;
  align-items: center;
}

.step-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--jade);
  color: #031510;
  font-weight: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-box strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.step-box span {
  font-size: 0.84rem;
  color: var(--text-soft);
}

@media (max-width: 960px) {
  .bento-2,
  .bento-3,
  .steps-strip {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SEO / GEO 8 Articles Hub
   ========================================================================== */
.kw-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.kw-tag {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  background: rgba(13, 28, 33, 0.88);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: border-color 0.18s ease, color 0.18s ease;
}

.kw-tag:hover {
  border-color: var(--jade-bright);
  color: var(--jade-bright);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.article-cat {
  display: inline-block;
  padding: 3px 9px;
  border-radius: var(--radius-xs);
  font-size: 0.74rem;
  font-weight: 700;
  background: var(--cyan-soft);
  color: var(--cyan);
  margin-bottom: 10px;
}

.article-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  line-height: 1.42;
  color: var(--text-main);
}

.article-card p {
  margin: 0 0 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.article-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--jade-bright);
  font-weight: 700;
}

.article-foot span {
  color: var(--text-muted);
  font-weight: 500;
}

@media (max-width: 1120px) {
  .articles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   User Reviews Grid
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.review-card {
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.review-stars {
  color: var(--amber-bright);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.review-text {
  margin: 0;
  font-size: 0.91rem;
  color: var(--text-soft);
  line-height: 1.68;
}

.review-author {
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.review-author strong {
  color: var(--text-main);
  display: block;
  font-size: 0.88rem;
}

.review-author span {
  color: var(--text-muted);
}

.review-plan {
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  background: var(--jade-soft);
  color: var(--jade-bright);
  font-weight: 700;
  white-space: nowrap;
}

@media (max-width: 960px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   FAQ Native Accordion (<details>)
   ========================================================================== */
.faq-list {
  display: grid;
  gap: 12px;
}

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

.faq-item[open] {
  border-color: var(--border-jade);
  background: rgba(13, 28, 34, 0.92);
}

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

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--jade-bright);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  content: "−";
  color: var(--amber-bright);
}

.faq-body {
  padding: 0 22px 18px;
  color: var(--text-soft);
  font-size: 0.93rem;
  border-top: 1px solid rgba(148, 184, 178, 0.1);
  padding-top: 14px;
}

/* ==========================================================================
   External Links & Bottom CTA Banner & Footer
   ========================================================================== */
.ext-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ext-card {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.ext-card strong {
  display: block;
  font-size: 0.94rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.ext-card span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@media (max-width: 960px) {
  .ext-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .ext-grid {
    grid-template-columns: 1fr;
  }
}

.cta-banner {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(125deg, rgba(16, 185, 129, 0.18) 0%, rgba(12, 26, 32, 0.94) 52%, rgba(245, 158, 11, 0.16) 100%);
  border: 1px solid var(--border-jade);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.cta-banner h2 {
  margin: 0 0 8px;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
}

.cta-banner p {
  margin: 0;
  color: var(--text-soft);
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--border);
  background: rgba(4, 9, 12, 0.92);
  padding: 46px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 0.94rem;
  color: var(--text-main);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Article Detail Pages (articles/*.html) & Legal/Sitemap Pages
   ========================================================================== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

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

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 28px;
  align-items: start;
  padding: 36px 0 64px;
}

.article-main {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

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

.article-header h1 {
  margin: 10px 0 14px;
  font-size: clamp(1.55rem, 2.7vw, 2.15rem);
  line-height: 1.3;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.article-tldr {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-jade);
  margin-bottom: 24px;
  font-size: 0.94rem;
  color: var(--text-soft);
}

.article-tldr strong {
  color: var(--jade-bright);
}

.article-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.article-body h2 {
  margin: 28px 0 12px;
  font-size: 1.32rem;
  color: var(--text-main);
  padding-left: 12px;
  border-left: 3px solid var(--jade-bright);
}

.article-body h3 {
  margin: 20px 0 8px;
  font-size: 1.08rem;
  color: var(--cyan);
}

.article-body p {
  margin: 0 0 14px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 16px;
  padding-left: 22px;
  display: grid;
  gap: 8px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 22px;
  font-size: 0.9rem;
  background: rgba(6, 14, 17, 0.72);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-body th,
.article-body td {
  padding: 11px 14px;
  border: 1px solid var(--border);
  text-align: left;
}

.article-body th {
  background: rgba(16, 185, 129, 0.14);
  color: var(--jade-bright);
  font-weight: 700;
}

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

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

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

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.87rem;
}

.toc-list a {
  color: var(--text-soft);
}

.toc-list a:hover {
  color: var(--jade-bright);
}

.article-nav {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.article-nav-card {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(9, 20, 24, 0.85);
  border: 1px solid var(--border);
  transition: border-color 0.18s ease;
}

.article-nav-card:hover {
  border-color: var(--jade-bright);
}

.article-nav-card span {
  display: block;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.article-nav-card strong {
  font-size: 0.92rem;
  color: var(--text-main);
}

.related-box {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.related-item {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(9, 20, 24, 0.85);
  border: 1px solid var(--border);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-soft);
}

.related-item:hover {
  border-color: var(--jade-bright);
  color: var(--jade-bright);
}

@media (max-width: 980px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .article-main {
    padding: 22px 18px;
  }

  .article-nav,
  .related-grid {
    grid-template-columns: 1fr;
  }
}