/* snipX-site 主样式 */
/* 参考风格：fg.vkr.me/mac — 深色太空 + 玻璃拟态 + 大圆角 + 蓝紫渐变 */

:root {
  color-scheme: dark;
  --bg: #050505;
  --bg-soft: #0b0c0e;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --line: rgba(255, 255, 255, 0.14);
  --line-soft: rgba(255, 255, 255, 0.08);
  --text: #f7f7f4;
  --muted: rgba(247, 247, 244, 0.68);
  --faint: rgba(247, 247, 244, 0.45);
  --accent-blue: #6aa7ff;
  --accent-pink: #f5a8ff;
  --accent-cyan: #71e2d4;
  --accent-amber: #f4c76a;
  --radius: 22px;
  --radius-lg: 28px;
  --max: 1180px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --topbar-h: 82px;
  --topbar-h-on-scroll: 56px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 12px);
}

body {
  min-height: 100%;
  margin: 0;
  background:
    radial-gradient(circle at 74% 8%, rgba(106, 167, 255, 0.18), transparent 34rem),
    radial-gradient(circle at 20% 22%, rgba(245, 168, 255, 0.12), transparent 28rem),
    radial-gradient(circle at 52% 42%, rgba(113, 226, 212, 0.07), transparent 32rem),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

#space-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  opacity: 0.85;
}

.site-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* ===== TopBar ===== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: var(--topbar-h);
  background: transparent;
  pointer-events: none;
  transition:
    height 220ms ease,
    background 220ms ease,
    box-shadow 220ms ease;
}

.topbar.is-stuck {
  height: var(--topbar-h-on-scroll);
  background: rgba(11, 12, 14, 0.72);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(24px) saturate(1.18);
  -webkit-backdrop-filter: blur(24px) saturate(1.18);
}

.topbar-inner {
  width: min(var(--max), calc(100% - 32px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  pointer-events: auto;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.topbar-brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-pink) 100%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.16) inset,
    0 6px 18px rgba(106, 167, 255, 0.34);
}

.topbar-brand-text {
  font-weight: 600;
}

.topbar-nav {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--muted);
}

.topbar-nav a {
  transition: color 180ms ease;
}

.topbar-nav a:hover {
  color: var(--text);
}

.topbar-cta {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 600;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
  box-shadow: 0 10px 28px rgba(247, 247, 244, 0.12);
}

.topbar-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 36px rgba(247, 247, 244, 0.18);
}

@media (max-width: 720px) {
  .topbar-nav {
    display: none;
  }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: calc(var(--topbar-h) + 64px) 0 96px;
  overflow: hidden;
}

.hero-meteors,
.hero-stardust {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-meteors::before,
.hero-meteors::after {
  content: "";
  position: absolute;
  width: 1px;
  height: 1px;
  border-radius: 50%;
  background: transparent;
  box-shadow:
    12vw 18vh rgba(255, 255, 255, 0.7),
    28vw 32vh rgba(255, 255, 255, 0.6),
    64vw 22vh rgba(255, 255, 255, 0.5),
    78vw 56vh rgba(255, 255, 255, 0.45),
    38vw 72vh rgba(255, 255, 255, 0.6),
    92vw 84vh rgba(255, 255, 255, 0.5);
  animation: meteor-drift 26s linear infinite;
}

.hero-meteors::after {
  animation-duration: 38s;
  animation-delay: -14s;
  opacity: 0.6;
  box-shadow:
    8vw 64vh rgba(255, 255, 255, 0.55),
    44vw 14vh rgba(255, 255, 255, 0.4),
    70vw 90vh rgba(255, 255, 255, 0.45),
    18vw 48vh rgba(255, 255, 255, 0.55);
}

@keyframes meteor-drift {
  from { transform: translateY(0); }
  to { transform: translateY(-30vh); }
}

.hero-inner {
  position: relative;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 56px;
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.hero-eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.hero-title {
  margin: 0;
  font-size: clamp(56px, 9vw, 124px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 700;
  background: linear-gradient(
    180deg,
    #ffffff 0%,
    #ffffff 35%,
    rgba(255, 255, 255, 0.74) 75%,
    rgba(255, 255, 255, 0.42) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-title-note {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.3;
  color: var(--text);
  font-weight: 500;
}

.hero-desc {
  margin: 22px 0 0;
  max-width: 560px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-visual {
  position: relative;
  min-width: 0;
}

@media (max-width: 920px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero {
    padding-top: calc(var(--topbar-h) + 36px);
    padding-bottom: 64px;
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
  white-space: nowrap;
}

.btn-lg {
  height: 54px;
  padding: 0 28px;
  font-size: 16px;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  box-shadow: 0 14px 36px rgba(247, 247, 244, 0.16);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 44px rgba(247, 247, 244, 0.22);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.btn-ghost:hover {
  background: var(--panel);
  border-color: rgba(255, 255, 255, 0.24);
}

/* ===== Section ===== */
.section {
  position: relative;
  padding: 88px 0;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.section-head {
  max-width: 720px;
  margin: 0 0 48px;
}

.section-eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-blue);
}

.section-title {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.section-desc {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--muted);
}

/* ===== Features ===== */
.features {
  display: flex;
  flex-direction: column;
  gap: 96px;
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.feature-row-reverse .feature-visual {
  order: 2;
}

.feature-row-reverse .feature-copy {
  order: 1;
}

.feature-visual {
  min-width: 0;
}

.feature-eyebrow {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-pink);
}

.feature-title {
  margin: 0;
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.feature-desc {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
}

.feature-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.feature-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--muted);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-pink));
}

@media (max-width: 920px) {
  .feature-row,
  .feature-row-reverse {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-row-reverse .feature-visual {
    order: 0;
  }

  .feature-row-reverse .feature-copy {
    order: 0;
  }

  .features {
    gap: 72px;
  }
}

/* ===== Install ===== */
.install-section {
  text-align: center;
}

.install-section .section-head {
  margin: 0 auto 56px;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin: 0 0 48px;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.install-step {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  text-align: left;
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    background 240ms ease;
}

.install-step:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.22);
  background: var(--panel-strong);
}

.install-step-num {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  margin-bottom: 18px;
  background:
    linear-gradient(135deg, rgba(106, 167, 255, 0.22), rgba(245, 168, 255, 0.22));
  border: 1px solid var(--line-soft);
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
}

.install-step-title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.install-step-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

.install-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.install-req {
  margin: 0;
  font-size: 13px;
  color: var(--faint);
  letter-spacing: 0.02em;
}

@media (max-width: 720px) {
  .install-steps {
    grid-template-columns: 1fr;
  }
}

/* ===== About ===== */
.about-section .section-head {
  text-align: center;
  margin: 0 auto 56px;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.about-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    background 240ms ease;
}

.about-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.22);
  background: var(--panel-strong);
}

.about-card-title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.about-card-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

@media (max-width: 920px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Placeholder Image ===== */
.ph-image {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: var(--ph-aspect, 16 / 10);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 28% 22%, rgba(106, 167, 255, 0.18), transparent 60%),
    radial-gradient(circle at 78% 78%, rgba(245, 168, 255, 0.16), transparent 60%),
    linear-gradient(135deg, #0e1014 0%, #15181f 100%);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.ph-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.ph-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.06), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.ph-image[data-aspect="16/10"] { --ph-aspect: 16 / 10; }
.ph-image[data-aspect="16/9"] { --ph-aspect: 16 / 9; }
.ph-image[data-aspect="4/3"] { --ph-aspect: 4 / 3; }
.ph-image[data-aspect="1/1"] { --ph-aspect: 1 / 1; }

.ph-icon {
  position: relative;
  z-index: 1;
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 300;
  color: rgba(255, 255, 255, 0.4);
  text-shadow: 0 4px 28px rgba(106, 167, 255, 0.3);
  margin-bottom: 12px;
}

.ph-label {
  position: relative;
  z-index: 1;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* 真实图到位后的样式（替换为 <img> 时无需改 CSS） */
.ph-image img,
.ph-image > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
}

.ph-image-hero {
  --ph-aspect: 16 / 10;
  border-radius: 28px;
  box-shadow:
    0 36px 90px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(255, 255, 255, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

/* ===== Footer ===== */
.footer {
  margin-top: 80px;
  padding: 56px 0 40px;
  border-top: 1px solid var(--line-soft);
  background: rgba(8, 9, 11, 0.6);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
}

.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
}

.footer-brand-text {
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--muted);
}

.footer-links a {
  transition: color 180ms ease;
}

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

.footer-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--muted);
}

.footer-contact-link {
  color: var(--text);
  transition: color 180ms ease;
}

.footer-contact-link:hover {
  color: var(--accent-blue);
}

.footer-meta {
  color: var(--faint);
}

.footer-copyright {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--faint);
}

.footer-sep {
  color: var(--faint);
}

.footer-icp {
  color: var(--muted);
  transition: color 180ms ease;
}

.footer-icp:hover {
  color: var(--text);
}

/* ===== Reveal 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-meteors::before,
  .hero-meteors::after {
    animation: none;
  }
}

/* ===== 小屏优化 ===== */
@media (max-width: 560px) {
  .topbar-cta {
    height: 34px;
    padding: 0 14px;
    font-size: 13px;
  }

  .section {
    padding: 64px 0;
  }

  .features {
    gap: 56px;
  }

  .footer {
    padding: 40px 0 28px;
  }
}