/* ==========================================================================
   ORANGE LIULIU STUDIO · LIGHT TECH DESIGN SYSTEM (明亮系未来科技风)
   ========================================================================== */

:root {
  /* Surface & Base Colors (明亮天幕基底) */
  --bg-main: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-pure: #ffffff;
  --card-bg: rgba(255, 255, 255, 0.78);
  --card-bg-hover: rgba(255, 255, 255, 0.95);
  --panel-bg: rgba(248, 250, 252, 0.85);

  /* Borders & Glass Specular */
  --border-light: rgba(226, 232, 240, 0.85);
  --border-tech: rgba(14, 165, 233, 0.25);
  --border-tech-orange: rgba(255, 107, 44, 0.25);
  --border-glow: rgba(99, 102, 241, 0.35);
  --glass-specular: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.4));

  /* Tech Accent Colors (科技光效霓虹点缀) */
  --orange: #ff6b2c;
  --orange-light: #ff8a42;
  --orange-soft: #fff3ec;
  --orange-glow: rgba(255, 107, 44, 0.35);

  --cyan: #0284c7;
  --cyan-bright: #00b4d8;
  --cyan-soft: #e0f2fe;
  --cyan-glow: rgba(2, 132, 199, 0.3);

  --violet: #6366f1;
  --violet-bright: #4f46e5;
  --violet-soft: #eef2ff;
  --violet-glow: rgba(99, 102, 241, 0.28);

  --emerald: #059669;
  --emerald-bright: #10b981;
  --emerald-soft: #ecfdf5;
  --emerald-glow: rgba(16, 185, 129, 0.3);

  /* High Contrast Modern Typography */
  --text-title: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px -10px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 20px 40px -15px rgba(15, 23, 42, 0.12), 0 8px 16px -4px rgba(15, 23, 42, 0.04);
  --shadow-glow-cyan: 0 12px 36px -8px rgba(2, 132, 199, 0.22);
  --shadow-glow-orange: 0 12px 36px -8px rgba(255, 107, 44, 0.25);
  --shadow-glow-violet: 0 12px 36px -8px rgba(99, 102, 241, 0.22);

  /* Fonts */
  --font-sans: "Inter", "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Animated Light Tech Canvas & Background Gradients */
.tech-bg-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  overflow: hidden;
}

.tech-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -3;
  background-image: 
    linear-gradient(to right, rgba(226, 232, 240, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.6) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 35%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, black 40%, transparent 85%);
}

.tech-glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.65;
  pointer-events: none;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-1 {
  width: 550px;
  height: 550px;
  top: -120px;
  left: -80px;
  background: radial-gradient(circle, rgba(255, 107, 44, 0.15), rgba(255, 186, 8, 0.08), transparent 70%);
}

.orb-2 {
  width: 620px;
  height: 620px;
  top: 5%;
  right: -150px;
  background: radial-gradient(circle, rgba(0, 180, 216, 0.18), rgba(99, 102, 241, 0.1), transparent 70%);
  animation-duration: 22s;
  animation-delay: -5s;
}

.orb-3 {
  width: 700px;
  height: 700px;
  top: 45%;
  left: 20%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12), rgba(2, 132, 199, 0.08), transparent 70%);
  animation-duration: 25s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.08); }
  100% { transform: translate(-40px, 70px) scale(0.95); }
}

/* Typography Utilities */
a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-shell {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-pure);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-full);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.08);
  margin-bottom: 18px;
}

.eyebrow-orange {
  color: var(--orange);
  border-color: var(--border-tech-orange);
  box-shadow: 0 2px 10px rgba(255, 107, 44, 0.08);
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--emerald-bright);
  box-shadow: 0 0 10px var(--emerald-bright);
  animation: pulseDot 2s infinite;
}

.eyebrow-dot-orange {
  background: var(--orange);
  box-shadow: 0 0 10px var(--orange);
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.7; }
}

h1, h2, h3, h4 {
  color: var(--text-title);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.gradient-text-hero {
  background: linear-gradient(135deg, #0f172a 20%, #0284c7 65%, #ff6b2c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-cyan {
  background: linear-gradient(135deg, #0f172a 30%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-orange {
  background: linear-gradient(135deg, #0f172a 30%, #ff6b2c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header & Glass Nav */
.studio-header-wrap {
  position: sticky;
  top: 16px;
  z-index: 100;
  padding: 0 24px;
}

.studio-header {
  width: min(var(--max-width), 100%);
  margin: 0 auto;
  min-height: 68px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-full);
  transition: all 0.3s ease;
}

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

.studio-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--orange), #ff9f43);
  box-shadow: 0 6px 18px var(--orange-glow);
  transform: rotate(-6deg);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.studio-brand:hover .studio-mark {
  transform: rotate(0deg) scale(1.08);
}

.studio-mark i {
  display: block;
  width: 3.5px;
  height: 12px;
  border-radius: 3px;
  background: #ffffff;
  transition: height 0.3s ease;
}

.studio-mark i:nth-child(2) {
  height: 20px;
  background: #fff0d4;
}

.studio-mark i:nth-child(3) {
  height: 9px;
  background: #ffffff;
}

.studio-brand-copy {
  display: flex;
  flex-direction: column;
}

.studio-brand-copy strong {
  font-size: 15px;
  color: var(--text-title);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.studio-brand-copy small {
  color: var(--text-subtle);
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.studio-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(241, 245, 249, 0.7);
  padding: 4px 6px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
}

.studio-nav a {
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
}

.studio-nav a:hover {
  color: var(--orange);
  background: var(--bg-pure);
  box-shadow: var(--shadow-sm);
}

.studio-nav a.active {
  color: var(--text-title);
  background: var(--bg-pure);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  background: var(--emerald-soft);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-full);
  color: var(--emerald);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
}

.pulse-node {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--emerald-bright);
  box-shadow: 0 0 8px var(--emerald-bright);
  animation: pulseDot 2s infinite;
}

.studio-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: linear-gradient(135deg, var(--orange), #ff8a42);
  color: #ffffff !important;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px var(--orange-glow);
  transition: all 0.25s ease;
}

.studio-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px var(--orange-glow);
}

.studio-nav-cta span {
  font-size: 14px;
  transition: transform 0.2s ease;
}

.studio-nav-cta:hover span {
  transform: translate(2px, -2px);
}

/* ==========================================================================
   HERO SECTION (交互式未来科技雷达与双端数据流)
   ========================================================================== */
.studio-hero {
  min-height: 640px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
  padding: 70px 0 90px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 2;
}

.hero-copy h1 {
  font-size: clamp(40px, 5.2vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.hero-copy h1 em {
  font-style: normal;
  display: block;
}

.hero-lede {
  color: var(--text-body);
  font-size: 17px;
  line-height: 1.85;
  max-width: 540px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 26px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.button:hover::after {
  transform: translateX(100%);
}

.button:hover {
  transform: translateY(-3px);
}

.button-orange {
  background: linear-gradient(135deg, var(--orange), #ff8a42);
  color: #ffffff;
  box-shadow: 0 8px 24px var(--orange-glow);
}

.button-orange:hover {
  box-shadow: 0 14px 32px var(--orange-glow);
}

.button-cyan {
  background: linear-gradient(135deg, var(--cyan), #00b4d8);
  color: #ffffff;
  box-shadow: 0 8px 24px var(--cyan-glow);
}

.button-cyan:hover {
  box-shadow: 0 14px 32px var(--cyan-glow);
}

.button-quiet {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-color: var(--border-light);
  color: var(--text-title);
  box-shadow: var(--shadow-sm);
}

.button-quiet:hover {
  background: #ffffff;
  border-color: rgba(255, 107, 44, 0.4);
  box-shadow: var(--shadow-md);
}

.hero-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.hero-metric-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}

.hero-metric-tag:hover {
  border-color: var(--border-tech);
  transform: translateY(-2px);
  color: var(--cyan);
}

.hero-metric-tag b {
  color: var(--text-title);
  font-weight: 700;
}

/* ==========================================================================
   INTERACTIVE TECH RADAR & DATA STREAM HUD (Hero 右侧科技雷达看板)
   ========================================================================== */
.hero-radar-box {
  position: relative;
  min-height: 490px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-xl);
  box-shadow: 
    0 25px 50px -12px rgba(15, 23, 42, 0.08),
    0 0 0 1px rgba(226, 232, 240, 0.6),
    inset 0 1px 0 rgba(255, 255, 255, 1);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.hero-radar-box:hover {
  box-shadow: 
    0 35px 70px -15px rgba(2, 132, 199, 0.15),
    0 0 0 1px var(--border-tech),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}

/* Sci-fi corner brackets */
.corner-bracket {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--cyan);
  border-style: solid;
  opacity: 0.5;
  pointer-events: none;
}
.corner-tl { top: 12px; left: 12px; border-width: 2px 0 0 2px; }
.corner-tr { top: 12px; right: 12px; border-width: 2px 2px 0 0; }
.corner-bl { bottom: 12px; left: 12px; border-width: 0 0 2px 2px; }
.corner-br { bottom: 12px; right: 12px; border-width: 0 2px 2px 0; }

.radar-header-bar {
  position: absolute;
  top: 18px;
  left: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  z-index: 5;
}

.radar-telemetry {
  display: flex;
  align-items: center;
  gap: 8px;
}

.radar-pulse-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(2, 132, 199, 0.22);
  pointer-events: none;
}

.ring-outer {
  width: 420px;
  height: 420px;
  animation: spinSlow 40s linear infinite;
}

.ring-middle {
  width: 300px;
  height: 300px;
  border-style: solid;
  border-color: rgba(255, 107, 44, 0.18);
  animation: spinReverse 28s linear infinite;
}

.ring-inner {
  width: 200px;
  height: 200px;
  border-color: rgba(99, 102, 241, 0.2);
  animation: spinSlow 18s linear infinite;
}

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

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

/* Radar Center Core */
.radar-core-hub {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 40%, #f0f7ff 100%);
  border: 2px solid #ffffff;
  box-shadow: 
    0 12px 35px rgba(2, 132, 199, 0.2),
    0 0 0 1px var(--border-tech),
    inset 0 0 20px rgba(2, 132, 199, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 4;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.radar-core-hub:hover {
  transform: scale(1.08);
}

.radar-core-icon {
  font-size: 28px;
  color: var(--orange);
  animation: floatCore 3s ease-in-out infinite;
}

@keyframes floatCore {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.radar-core-hub strong {
  font-size: 13px;
  color: var(--text-title);
  margin-top: 4px;
}

.radar-core-hub small {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--cyan);
  font-weight: 600;
}

/* Live Data Stream Track & Beams */
.data-beam-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
}

.beam-line {
  stroke: rgba(2, 132, 199, 0.25);
  stroke-width: 2;
  stroke-dasharray: 4 4;
}

.beam-particle {
  fill: var(--cyan-bright);
  filter: drop-shadow(0 0 6px var(--cyan-bright));
}

/* Interactive Device Nodes in Radar */
.radar-node-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.07);
  z-index: 4;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.radar-node-card:hover {
  transform: translateY(-4px) scale(1.03);
  border-color: var(--border-tech);
  box-shadow: var(--shadow-glow-cyan);
}

.node-phone {
  top: 75px;
  left: 32px;
}

.node-mac {
  bottom: 75px;
  right: 32px;
}

.node-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.node-icon-cyan {
  background: var(--cyan-soft);
  color: var(--cyan);
}

.node-icon-orange {
  background: var(--orange-soft);
  color: var(--orange);
}

.node-info {
  display: flex;
  flex-direction: column;
}

.node-info strong {
  font-size: 12.5px;
  color: var(--text-title);
}

.node-info small {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

.node-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald-bright);
  box-shadow: 0 0 8px var(--emerald-bright);
}

/* Floating Live Payload Pill */
.radar-payload-pill {
  position: absolute;
  top: 48%;
  left: 20%;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #ffffff;
  border: 1px solid rgba(2, 132, 199, 0.35);
  border-radius: var(--radius-full);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.18);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--cyan);
  z-index: 5;
  animation: floatPayload 4s ease-in-out infinite;
}

@keyframes floatPayload {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.radar-footer-bar {
  position: absolute;
  bottom: 16px;
  left: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 9.5px;
  color: var(--text-muted);
  z-index: 5;
}

/* ==========================================================================
   TECH PRINCIPLES RIBBON (01 本地优先 · 02 极简轻量 · 03 透明开源 · 04 跨端进化)
   ========================================================================== */
.studio-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 24px 0;
  margin: 30px 0 80px;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.strip-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  transition: all 0.28s ease;
}

.strip-item:hover {
  background: #ffffff;
  border-color: var(--border-tech);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.strip-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--orange);
  background: var(--orange-soft);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.strip-copy {
  display: flex;
  flex-direction: column;
}

.strip-copy strong {
  font-size: 14px;
  color: var(--text-title);
  font-weight: 700;
}

.strip-copy small {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   FLAGSHIP PRODUCTS MATRIX (双子星产品科技矩阵)
   ========================================================================== */
.products-section {
  padding: 50px 0 110px;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 50px;
}

.section-header h2 {
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.12;
  margin-top: 8px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 440px;
  line-height: 1.75;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.product-card {
  position: relative;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  padding: 40px 38px 42px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  opacity: 0.8;
  transition: height 0.3s ease;
}

.product-card-cyan::before {
  background: linear-gradient(90deg, var(--cyan), var(--emerald-bright));
}

.product-card-orange::before {
  background: linear-gradient(90deg, var(--orange), var(--violet));
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 1);
}

.product-card-cyan:hover {
  box-shadow: var(--shadow-glow-cyan);
}

.product-card-orange:hover {
  box-shadow: var(--shadow-glow-orange);
}

.product-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.product-code-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.12em;
}

.product-platform-pills {
  display: flex;
  gap: 6px;
}

.platform-pill {
  padding: 4px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-body);
}

.platform-pill-highlight {
  background: var(--cyan-soft);
  color: var(--cyan);
  border-color: rgba(2, 132, 199, 0.25);
}

.platform-pill-orange {
  background: var(--orange-soft);
  color: var(--orange);
  border-color: rgba(255, 107, 44, 0.25);
}

.product-identity {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
}

.product-hero-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.landrop-icon-box {
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  border: 1px solid rgba(2, 132, 199, 0.3);
}

.landrop-bars {
  display: flex;
  align-items: center;
  gap: 3px;
}

.landrop-bars i {
  display: block;
  width: 4px;
  border-radius: 3px;
}

.landrop-bars i:nth-child(1) { height: 16px; background: var(--cyan); }
.landrop-bars i:nth-child(2) { height: 26px; background: var(--emerald-bright); }
.landrop-bars i:nth-child(3) { height: 12px; background: var(--orange); }

.landrop-icon-img,
.playweb-icon-img {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.product-identity-copy h3 {
  font-size: 28px;
  letter-spacing: -0.04em;
  margin-bottom: 4px;
}

.product-identity-copy p {
  color: var(--orange);
  font-weight: 700;
  font-size: 14px;
}

.product-card-cyan .product-identity-copy p {
  color: var(--cyan);
}

.product-desc {
  color: var(--text-body);
  font-size: 14.5px;
  line-height: 1.8;
  margin-bottom: 24px;
}

.product-feature-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-bottom: 34px;
}

.product-feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-body);
}

.feature-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
}

.check-cyan {
  background: var(--cyan-soft);
  color: var(--cyan);
}

.check-orange {
  background: var(--orange-soft);
  color: var(--orange);
}

.product-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: auto;
}

/* ==========================================================================
   PRINCIPLES & SECURITY ARCHITECTURE (我们在意 · 架构原则)
   ========================================================================== */
.principles-section {
  padding: 60px 0 110px;
}

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

.principle-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.principle-card:hover {
  transform: translateY(-4px);
  background: #ffffff;
  border-color: var(--border-tech);
  box-shadow: var(--shadow-md);
}

.principle-icon-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.principle-icon-box {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-subtle);
  font-weight: 700;
}

.principle-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.principle-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
}

/* ==========================================================================
   DEVELOPER TERMINAL & ABOUT STUDIO (开发者控制台与关于)
   ========================================================================== */
.about-section {
  padding: 20px 0 110px;
}

.terminal-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(241, 245, 249, 0.9));
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 107, 44, 0.25);
  border-radius: var(--radius-xl);
  padding: 50px 54px;
  box-shadow: 
    0 20px 45px -10px rgba(255, 107, 44, 0.12),
    0 0 0 1px rgba(255, 255, 255, 0.8);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.terminal-card::after {
  content: '';
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 107, 44, 0.08), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.terminal-copy h2 {
  font-size: clamp(30px, 3.8vw, 44px);
  margin-bottom: 18px;
}

.terminal-copy p {
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 14px;
}

.terminal-copy .note-text {
  color: var(--text-muted);
  font-size: 13px;
}

.terminal-side-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.terminal-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13.5px;
}

.terminal-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--orange);
  background: var(--orange-soft);
  padding: 3px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}

.terminal-val {
  color: var(--text-body);
  line-height: 1.6;
}

/* ==========================================================================
   STUDIO MANIFESTO & PHILOSOPHY (设计哲学与初心对比)
   ========================================================================== */
.manifesto-section {
  padding: 80px 0 100px;
}

.manifesto-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.manifesto-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.manifesto-card:hover {
  transform: translateY(-4px);
  background: #ffffff;
  border-color: var(--border-tech-orange);
  box-shadow: var(--shadow-glow-orange);
}

.manifesto-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--orange), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.manifesto-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.manifesto-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
}

.badge-pain {
  background: #fee2e2;
  color: #dc2626;
}

.badge-gain {
  background: var(--emerald-soft);
  color: var(--emerald);
}

.manifesto-versus {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 14px;
  padding: 16px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  font-size: 13px;
}

.versus-col strong {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
}

.versus-bad {
  color: #991b1b;
}

.versus-good {
  color: #065f46;
}

/* ==========================================================================
   INTERACTIVE PLATFORM SELECTOR TABS (全平台矩阵切换器)
   ========================================================================== */
.platform-hub-box {
  margin-top: 28px;
  background: rgba(248, 250, 252, 0.95);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
}

.platform-tab-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.platform-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.platform-tab-btn:hover {
  color: var(--text-title);
  background: rgba(255, 255, 255, 0.8);
}

.platform-tab-btn.active {
  background: #ffffff;
  color: var(--orange);
  border-color: var(--border-tech-orange);
  box-shadow: 0 2px 8px rgba(255, 107, 44, 0.15);
}

.product-card-cyan .platform-tab-btn.active {
  color: var(--cyan);
  border-color: var(--border-tech);
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.15);
}

.platform-tab-pane {
  display: none;
  animation: fadeInPane 0.3s ease-out forwards;
}

.platform-tab-pane.active {
  display: block;
}

@keyframes fadeInPane {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.platform-pane-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
}

.platform-pane-info h5 {
  font-size: 15px;
  color: var(--text-title);
  margin-bottom: 4px;
}

.platform-pane-info p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.platform-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
}

.status-ready {
  background: var(--emerald-soft);
  color: var(--emerald);
}

.status-planned {
  background: var(--violet-soft);
  color: var(--violet);
}

/* ==========================================================================
   TYPEDROP INPUT METHOD CONCEPT & LIVE SIMULATOR (输入法跨端流转演示)
   ========================================================================== */
.typedrop-section {
  padding: 80px 0 110px;
}

.typedrop-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.92));
  backdrop-filter: blur(24px);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: 
    0 24px 50px -12px rgba(99, 102, 241, 0.14),
    0 0 0 1px rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}

.typedrop-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
  margin-top: 36px;
}

.typedrop-sim-wrap {
  background: #0f172a;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}

.sim-device-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: center;
}

.sim-box {
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 16px;
}

.sim-box-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-bright);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-clip-content {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #e2e8f0;
  background: rgba(15, 23, 42, 0.6);
  padding: 8px 10px;
  border-radius: 6px;
  border-left: 3px solid var(--orange);
}

.sim-beam-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 10px;
}

.sim-beam-pulse {
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  border-radius: 2px;
  animation: beamPulse 1.8s infinite;
}

@keyframes beamPulse {
  0% { transform: scaleX(0.2); opacity: 0.2; }
  50% { transform: scaleX(1); opacity: 1; }
  100% { transform: scaleX(0.2); opacity: 0.2; }
}

.mock-keyboard {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 12px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mock-candidate-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(30, 41, 59, 0.95);
  border: 1px solid var(--orange);
  padding: 8px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
  animation: candidateGlow 2.5s infinite alternate;
}

@keyframes candidateGlow {
  0% { box-shadow: 0 0 10px rgba(255, 107, 44, 0.2); }
  100% { box-shadow: 0 0 20px rgba(255, 107, 44, 0.6); }
}

.mock-candidate-bar span {
  font-size: 12px;
}

.mock-paste-btn {
  background: var(--orange);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: auto;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.mock-paste-btn:hover {
  transform: scale(1.05);
}

.mock-keys-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
}

.mock-key {
  background: rgba(51, 65, 85, 0.7);
  color: #cbd5e1;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 8px 0;
  text-align: center;
  border-radius: 4px;
  border-bottom: 2px solid rgba(0, 0, 0, 0.4);
}

.typedrop-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.typedrop-feature-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all 0.25s ease;
}

.typedrop-feature-item:hover {
  border-color: var(--violet);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.typedrop-feature-item h4 {
  font-size: 15px;
  color: var(--text-title);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.typedrop-feature-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   PRODUCT MATRIX TABLE (产品矩阵总览对比)
   ========================================================================== */
.matrix-section {
  padding: 40px 0 100px;
}

.matrix-table-wrap {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.matrix-table th {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 2px solid var(--bg-subtle);
  text-transform: uppercase;
}

.matrix-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--bg-subtle);
  color: var(--text-body);
}

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

.matrix-app-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-title);
  display: flex;
  align-items: center;
  gap: 10px;
}

.matrix-pill {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
}

.pill-green {
  background: var(--emerald-soft);
  color: var(--emerald);
}

.pill-orange {
  background: var(--orange-soft);
  color: var(--orange);
}

.pill-blue {
  background: var(--cyan-soft);
  color: var(--cyan);
}

.pill-purple {
  background: var(--violet-soft);
  color: var(--violet);
}

/* ==========================================================================
   FOOTER (科技底栏)
   ========================================================================== */
.studio-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 36px;
  margin-top: 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-light);
}

.footer-brand-copy {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 13.5px;
  max-width: 360px;
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  justify-self: end;
}

.footer-col h4 {
  font-size: 13px;
  color: var(--text-title);
  margin-bottom: 14px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a {
  font-size: 13px;
  color: var(--text-muted);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-subtle);
}

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

/* ==========================================================================
   TOAST & COPY FEEDBACK
   ========================================================================== */
.toast-msg {
  position: fixed;
  bottom: 28px;
  right: 28px;
  padding: 12px 22px;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 999;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   REVEAL & 3D TILT ANIMATIONS (更多动效支持)
   ========================================================================== */
.reveal-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up.active {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Interactive Hover Glow Card (跟着鼠标的微光) */
.interactive-glow-card {
  position: relative;
}

.interactive-glow-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(2, 132, 199, 0.12), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 2;
}

.interactive-glow-card:hover::after {
  opacity: 1;
}

/* ==========================================================================
   RESPONSIVE DESIGN (全设备优雅适配)
   ========================================================================== */
@media (max-width: 980px) {
  .studio-hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 40px 0 60px;
  }

  .hero-radar-box {
    min-height: 420px;
  }

  .manifesto-grid {
    grid-template-columns: 1fr;
  }

  .typedrop-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .principle-grid {
    grid-template-columns: 1fr;
  }

  .terminal-card {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 36px 30px;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-nav-grid {
    justify-self: start;
  }
}

@media (max-width: 768px) {
  .studio-header-wrap {
    padding: 0 12px;
    top: 10px;
  }

  .studio-header {
    min-height: 60px;
    padding: 0 14px;
  }

  .studio-nav {
    display: none;
  }

  .studio-strip {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .typedrop-card {
    padding: 28px 20px;
  }

  .typedrop-features-grid {
    grid-template-columns: 1fr;
  }

  .sim-device-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .sim-beam-arrow {
    transform: rotate(90deg);
    margin: 6px 0;
  }

  .platform-pane-content {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .footer-nav-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .section-shell {
    width: calc(100% - 32px);
  }

  .studio-brand-copy small {
    display: none;
  }

  .hero-copy h1 {
    font-size: 34px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .button {
    width: 100%;
  }

  .studio-strip {
    grid-template-columns: 1fr;
  }

  .radar-node-card {
    padding: 8px 12px;
  }

  .node-phone {
    top: 55px;
    left: 14px;
  }

  .node-mac {
    bottom: 55px;
    right: 14px;
  }

  .manifesto-versus {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .platform-tab-nav {
    gap: 6px;
  }

  .platform-tab-btn {
    font-size: 11px;
    padding: 5px 10px;
  }
}

/* ==========================================================================
   STUDIO DIRECT FEEDBACK FORM (在线留言表单样式)
   ========================================================================== */
.feedback-form-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-tech);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-lg);
}

.studio-feedback-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-title);
}

.required-star {
  color: var(--orange);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text-body);
  background: rgba(248, 250, 252, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  outline: none;
  transition: all 0.25s ease;
  box-sizing: border-box;
}

.form-input:focus,
.form-textarea:focus {
  background: #ffffff;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.topic-selector-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.topic-chip {
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(241, 245, 249, 0.8);
  color: var(--text-body);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.topic-chip:hover {
  border-color: var(--border-tech-orange);
  background: #ffffff;
}

.topic-chip.active {
  background: var(--orange-soft);
  color: var(--orange);
  border-color: var(--border-tech-orange);
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(255, 107, 44, 0.15);
}

.form-hint-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-submit-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.form-status-msg {
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 8px;
  display: none;
}

.form-status-msg.success {
  display: block;
  background: var(--emerald-soft);
  color: var(--emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status-msg.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

@media (max-width: 768px) {
  .feedback-form-card {
    padding: 24px 18px;
  }
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
}