/* ============================================================================
   钓点先知 · 官方介绍页
   视觉方向：水文仪器 / 航海图志
   - 深墨青（Abyss）为夜航底色，暖纸色（Paper）为白昼章节
   - 品牌青 #3EC6C4 作为唯一高饱和强调色；黄铜 #C9A45C 只用于“黄金窗口”等
     仪器刻度语义，不做大面积 UI 色
   - 全部样式外置：生产 nginx CSP 为 style-src 'self'，禁止内联样式
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. 设计令牌
   --------------------------------------------------------------------------- */
:root {
  /* 色板 */
  --abyss: #041114;
  --abyss-2: #061a1f;
  --ink: #0b2a37;
  --teal: #3ec6c4;
  --teal-bright: #7debe4;
  --teal-deep: #0a6362;
  --sea-glass: #b8e9e4;
  --mist: #9db8be;
  --mist-2: #6f8e96;
  --paper: #f2efe7;
  --paper-2: #e9e5d9;
  --paper-ink: #0b2a37;
  --paper-muted: #5b737b;
  --brass: #c9a45c;
  --brass-bright: #e4c07e;

  /* 线 */
  --line-dark: rgba(184, 233, 228, 0.12);
  --line-dark-strong: rgba(184, 233, 228, 0.22);
  --line-light: rgba(11, 42, 55, 0.14);

  /* 玻璃 */
  --glass: rgba(255, 255, 255, 0.035);
  --glass-2: rgba(255, 255, 255, 0.06);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue",
    "Microsoft YaHei", sans-serif;
  --font-display: "Avenir Next", "Futura", "Helvetica Neue", -apple-system,
    "PingFang SC", sans-serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", "Liberation Mono", monospace;
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;

  /* 布局 */
  --shell: 1200px;
  --gutter: clamp(20px, 4vw, 48px);
  --section-y: clamp(84px, 11vw, 148px);
}

/* ---------------------------------------------------------------------------
   2. 基础
   --------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--abyss);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  background: rgba(62, 198, 196, 0.28);
  color: #fff;
}

h1,
h2,
h3,
p,
dl,
dd,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.shell {
  width: 100%;
  max-width: calc(var(--shell) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
}

section[id] {
  scroll-margin-top: 96px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--teal);
  color: var(--abyss);
  font-size: 13px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 4px;
}

/* ---------------------------------------------------------------------------
   3. 通用排版
   --------------------------------------------------------------------------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}

.eyebrow-rule {
  width: 26px;
  height: 1px;
  flex: none;
  background: var(--teal);
}

.eyebrow-dark {
  color: #58717a;
}

.eyebrow-dark .eyebrow-rule {
  background: var(--teal-deep);
}

.section {
  position: relative;
  padding: var(--section-y) 0;
}

.section-paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-top: 1px solid rgba(255, 255, 255, 0.4);
}

.section-dark {
  background: var(--abyss);
  color: var(--paper);
  overflow: hidden;
}

.section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 82% 6%, rgba(62, 198, 196, 0.055), transparent 62%),
    radial-gradient(720px 460px at 8% 92%, rgba(201, 164, 92, 0.03), transparent 64%);
}

.section-dark .shell {
  position: relative;
  z-index: 1;
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(48px, 7vw, 84px);
}

.section-head h2 {
  color: var(--paper-ink);
}

.section-dark h2,
.final-cta h2 {
  color: #f4f2eb;
}

h2 {
  margin: 20px 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 4.4vw, 60px);
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.section-lede {
  max-width: 640px;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--paper-muted);
}

.section-dark .section-lede {
  color: #afc3c7;
}

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

.centered .eyebrow {
  justify-content: center;
}

.centered .section-lede {
  margin-inline: auto;
}

/* ---------------------------------------------------------------------------
   4. 按钮
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 24px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1;
  white-space: nowrap;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease,
    transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-arrow {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-primary {
  background: var(--teal);
  color: #04201f;
  font-weight: 500;
  box-shadow: 0 12px 34px rgba(62, 198, 196, 0.18);
}

.btn-primary:hover {
  background: #5ed4d2;
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(62, 198, 196, 0.24);
}

.btn-ghost {
  border: 1px solid var(--line-dark-strong);
  color: var(--paper);
}

.btn-ghost:hover {
  border-color: rgba(62, 198, 196, 0.55);
  background: rgba(62, 198, 196, 0.06);
}

.btn-sm {
  padding: 11px 18px;
  font-size: 12.5px;
}

.btn-text {
  padding: 15px 2px;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  color: var(--sea-glass);
  font-size: 13.5px;
  letter-spacing: 0.02em;
}

.btn-text:hover {
  color: var(--teal-bright);
  border-bottom-color: rgba(62, 198, 196, 0.5);
}

/* ---------------------------------------------------------------------------
   5. 顶部导航
   --------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.35s ease, border-color 0.35s ease,
    backdrop-filter 0.35s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(4, 17, 20, 0.82);
  border-bottom-color: var(--line-dark);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  height: 92px;
  transition: height 0.35s ease;
}

.site-header.is-scrolled .header-inner {
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand-img {
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 50%;
  object-fit: cover;
  box-shadow:
    0 0 0 1px rgba(184, 233, 228, 0.3),
    0 0 18px rgba(62, 198, 196, 0.16);
  transition: width 0.35s ease, height 0.35s ease;
}

.site-header.is-scrolled .brand-img {
  width: 30px;
  height: 30px;
}

.brand-text {
  display: grid;
  gap: 3px;
}

.brand-cn {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: #f4f2eb;
  line-height: 1;
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.24em;
  color: var(--mist-2);
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 2.6vw, 36px);
  margin-left: auto;
}

.site-nav a {
  position: relative;
  padding: 6px 0;
  font-size: 13px;
  color: rgba(184, 233, 228, 0.72);
  transition: color 0.25s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--teal-bright);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.header-cta {
  border-color: var(--line-dark-strong);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.nav-toggle-line {
  display: block;
  width: 17px;
  height: 1px;
  background: var(--sea-glass);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 128px var(--gutter) 40px;
  background:
    radial-gradient(700px 500px at 80% 8%, rgba(62, 198, 196, 0.1), transparent 62%),
    var(--abyss);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s ease;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
}

.mobile-nav a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: clamp(24px, 7vw, 30px);
  font-weight: 300;
  color: #eaf6f8;
}

.mobile-index {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.mobile-menu-foot {
  font-size: 8px;
  letter-spacing: 0.22em;
  color: var(--mist-2);
}

/* ---------------------------------------------------------------------------
   6. 首屏
   --------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 168px 0 92px;
  overflow: hidden;
  background:
    radial-gradient(1100px 680px at 80% 16%, rgba(62, 198, 196, 0.1), transparent 62%),
    radial-gradient(900px 600px at 12% 88%, rgba(201, 164, 92, 0.045), transparent 64%),
    linear-gradient(180deg, #041114 0%, #051719 58%, #041114 100%);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.6;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    #000 18%,
    #000 76%,
    transparent 100%
  );
  mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    #000 18%,
    #000 76%,
    transparent 100%
  );
}

.hero-glow {
  position: absolute;
  left: 50%;
  bottom: -24%;
  width: min(1500px, 140vw);
  height: 620px;
  transform: translateX(-50%);
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 60%, rgba(62, 198, 196, 0.16), transparent 64%),
    radial-gradient(ellipse at 62% 70%, rgba(228, 192, 126, 0.06), transparent 58%);
  filter: blur(22px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(40px, 6vw, 90px);
  z-index: 2;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin: 28px 0 24px;
  font-family: var(--font-display);
  font-size: clamp(46px, 6.4vw, 86px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: #f4f2eb;
}

.hero h1 em {
  font-style: normal;
  color: var(--teal);
  text-shadow: 0 0 46px rgba(62, 198, 196, 0.22);
}

.hero .lede {
  max-width: 540px;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.95;
  color: #afc3c7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.hero-log {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 16px 30px;
  justify-content: start;
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}

.hero-log-item dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--mist-2);
}

.hero-log-item dd {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--sea-glass);
  white-space: nowrap;
}

.log-trend {
  color: var(--brass-bright);
}

.hero-log-note {
  grid-column: 1 / -1;
  margin-top: 2px;
  font-size: 9.5px;
  letter-spacing: 0.04em;
  color: var(--mist-2);
}

/* ---------------------------------------------------------------------------
   7. 首屏仪器盘
   --------------------------------------------------------------------------- */
.hero-instrument {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
}

.instrument-card {
  position: relative;
  width: 100%;
  max-width: 540px;
  padding: 20px 22px 16px;
  border: 1px solid var(--line-dark-strong);
  border-radius: 26px;
  background: linear-gradient(155deg, rgba(14, 45, 54, 0.9), rgba(5, 20, 24, 0.95));
  box-shadow:
    0 44px 110px rgba(0, 0, 0, 0.48),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.instrument-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--mist-2);
}

.instrument-date {
  color: rgba(184, 233, 228, 0.5);
}

.dial-wrap {
  position: relative;
  width: min(100%, 430px);
  margin: 4px auto 0;
  aspect-ratio: 1 / 1;
}

.dial {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.dial-halo {
  fill: none;
  stroke: rgba(62, 198, 196, 0.045);
  stroke-width: 46;
}

.dial-ring-faint {
  fill: none;
  stroke: rgba(184, 233, 228, 0.08);
  stroke-width: 12;
}

.dial-ring-dash {
  fill: none;
  stroke: rgba(184, 233, 228, 0.2);
  stroke-width: 1;
  stroke-dasharray: 2 10;
}

.dial-inner {
  fill: rgba(4, 17, 20, 0.55);
  stroke: rgba(184, 233, 228, 0.1);
  stroke-width: 1;
}

.tick {
  stroke: rgba(184, 233, 228, 0.2);
  stroke-width: 1;
}

.tick-major {
  stroke: rgba(184, 233, 228, 0.5);
  stroke-width: 1.4;
}

.act {
  fill: none;
  stroke-linecap: round;
  stroke-width: 11;
}

.act-peak {
  stroke: var(--teal);
  filter: drop-shadow(0 0 9px rgba(62, 198, 196, 0.4));
  animation: dialArc 1.5s cubic-bezier(0.22, 0.61, 0.36, 1) 0.25s both;
}

.act-sub {
  stroke: rgba(62, 198, 196, 0.42);
}

.act-low {
  stroke: rgba(184, 233, 228, 0.09);
}

.dial-hand {
  stroke: rgba(184, 233, 228, 0.18);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.dial-now-glow {
  fill: rgba(62, 198, 196, 0.18);
  transform-box: fill-box;
  transform-origin: center;
  animation: nowPulse 3.2s ease-out infinite;
}

.dial-now {
  fill: var(--teal-bright);
  filter: drop-shadow(0 0 8px rgba(125, 235, 228, 0.8));
}

.dial-hour {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  fill: rgba(184, 233, 228, 0.42);
}

.dial-now-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  fill: var(--teal);
}

.dial-readout {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 62%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}

.dial-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(58px, 6.4vw, 80px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #f4f2eb;
  font-variant-numeric: tabular-nums;
}

.dial-label {
  display: block;
  margin-top: 8px;
  font-size: 9.5px;
  letter-spacing: 0.24em;
  color: var(--mist-2);
}

.dial-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 11px;
  border: 1px solid rgba(62, 198, 196, 0.4);
  border-radius: 999px;
  background: rgba(62, 198, 196, 0.08);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.dial-species {
  display: block;
  margin-top: 11px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--sea-glass);
}

.dial-chip {
  position: absolute;
  z-index: 2;
  min-width: 108px;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 11px;
  background: rgba(4, 17, 20, 0.8);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.chip-k {
  display: block;
  font-size: 7.5px;
  letter-spacing: 0.2em;
  color: var(--mist-2);
}

.chip-v {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--sea-glass);
  white-space: nowrap;
}

.chip-pressure {
  top: 2%;
  left: 0;
}

.chip-wind {
  top: 2%;
  right: 0;
}

.chip-moon {
  bottom: 6%;
  left: 1%;
}

/* 潮汐条 */
.tide-strip {
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
}

.tide-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--mist-2);
}

.golden-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid rgba(201, 164, 92, 0.35);
  border-radius: 999px;
  background: rgba(201, 164, 92, 0.08);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--brass-bright);
  white-space: nowrap;
}

.golden-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brass-bright);
  box-shadow: 0 0 8px rgba(228, 192, 126, 0.8);
  flex: none;
}

.tide-curve {
  width: 100%;
  height: auto;
  margin-top: 8px;
}

.tide-grid {
  stroke: rgba(184, 233, 228, 0.08);
  stroke-width: 1;
  stroke-dasharray: 2 6;
}

.tide-window {
  fill: rgba(201, 164, 92, 0.08);
  stroke: rgba(201, 164, 92, 0.28);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.tide-now-line {
  stroke: rgba(62, 198, 196, 0.35);
  stroke-width: 1;
  stroke-dasharray: 2 4;
}

.tide-line {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.8;
  stroke-linecap: round;
}

.tide-peak {
  fill: var(--teal-bright);
  filter: drop-shadow(0 0 6px rgba(125, 235, 228, 0.7));
}

.tide-peak-soft {
  opacity: 0.45;
}

.tide-label {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  fill: var(--brass-bright);
}

.tide-hours {
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
  font-size: 7.5px;
  color: var(--mist-2);
}

.instrument-foot {
  margin-top: 10px;
  font-size: 7.5px;
  letter-spacing: 0.18em;
  color: rgba(140, 170, 176, 0.5);
  text-align: right;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 24px;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transform: translateX(-50%);
  font-size: 7.5px;
  letter-spacing: 0.3em;
  color: var(--mist-2);
}

.hero-scroll-line {
  width: 1px;
  height: 42px;
  background: linear-gradient(to bottom, var(--teal), transparent);
  animation: scrollLine 2.6s ease-in-out infinite;
}

/* ---------------------------------------------------------------------------
   8. 首屏载入动效
   --------------------------------------------------------------------------- */
.hero-copy > * {
  animation: heroIn 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.hero-copy > :nth-child(1) {
  animation-delay: 0.05s;
}
.hero-copy > :nth-child(2) {
  animation-delay: 0.13s;
}
.hero-copy > :nth-child(3) {
  animation-delay: 0.21s;
}
.hero-copy > :nth-child(4) {
  animation-delay: 0.29s;
}
.hero-copy > :nth-child(5) {
  animation-delay: 0.37s;
}

.hero-instrument {
  animation: heroCardIn 1.15s cubic-bezier(0.22, 0.61, 0.36, 1) 0.22s both;
}

/* 滚动揭示 */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.8s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
}

html.js-ready [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.why-grid > [data-reveal]:nth-child(2),
.access-grid > [data-reveal]:nth-child(2),
.platform-grid > [data-reveal]:nth-child(2) {
  transition-delay: 0.1s;
}

.why-grid > [data-reveal]:nth-child(3),
.access-grid > [data-reveal]:nth-child(3) {
  transition-delay: 0.2s;
}

.bento > [data-reveal]:nth-child(2),
.steps > [data-reveal]:nth-child(2),
.spec-grid > [data-reveal]:nth-child(2) {
  transition-delay: 0.08s;
}

.bento > [data-reveal]:nth-child(3),
.steps > [data-reveal]:nth-child(3),
.spec-grid > [data-reveal]:nth-child(3) {
  transition-delay: 0.16s;
}

.bento > [data-reveal]:nth-child(4),
.steps > [data-reveal]:nth-child(4),
.spec-grid > [data-reveal]:nth-child(4) {
  transition-delay: 0.24s;
}

.bento > [data-reveal]:nth-child(5) {
  transition-delay: 0.32s;
}
.bento > [data-reveal]:nth-child(6) {
  transition-delay: 0.4s;
}

/* ---------------------------------------------------------------------------
   9. 为什么 / 对比
   --------------------------------------------------------------------------- */
.compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  margin-bottom: clamp(56px, 8vw, 88px);
  border: 1px solid var(--line-light);
  border-radius: 22px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.34);
}

.compare-panel {
  padding: clamp(28px, 4vw, 52px);
}

.compare-before {
  color: var(--paper-muted);
}

.compare-quote {
  font-family: var(--font-serif);
  font-size: clamp(21px, 2.4vw, 30px);
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: 0.01em;
  color: #3f5962;
}

.compare-note {
  margin-top: 30px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--paper-muted);
}

.compare-after {
  background: var(--ink);
  color: var(--paper);
}

.compare-answer {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.55vw, 18.5px);
  line-height: 2.05;
  letter-spacing: 0.01em;
  color: var(--sea-glass);
}

.compare-after .compare-note {
  color: rgba(184, 233, 228, 0.6);
}

.compare-label {
  display: block;
  margin-bottom: 26px;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--paper-muted);
}

.compare-after .compare-label {
  color: var(--teal);
}

.compare-divider {
  position: relative;
  width: 1px;
  background: var(--line-light);
}

.compare-divider span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 5px var(--paper);
  transform: translate(-50%, -50%);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding-top: 30px;
  border-top: 1px solid var(--line-light);
}

.why-item {
  padding-top: 4px;
}

.why-index {
  display: block;
  margin-bottom: 20px;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--teal-deep);
}

.why-item h3 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--paper-ink);
}

.why-item p {
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--paper-muted);
}

/* ---------------------------------------------------------------------------
   10. 能力 Bento
   --------------------------------------------------------------------------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.bento-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 240px;
  padding: clamp(22px, 2.4vw, 32px);
  border: 1px solid var(--line-dark);
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.018));
  overflow: hidden;
  transition: transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1),
    border-color 0.5s ease, background 0.5s ease;
}

.bento-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.45s ease;
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 50%),
    rgba(62, 198, 196, 0.09),
    transparent 62%
  );
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(62, 198, 196, 0.32);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
}

.bento-card:hover::after {
  opacity: 1;
}

.bento-hourly {
  grid-column: span 7;
}

.bento-precise {
  grid-column: span 5;
}

.bento-small {
  grid-column: span 4;
}

.bento-log {
  grid-column: span 12;
}

.bento-copy,
.bento-log-copy {
  position: relative;
  z-index: 2;
}

.bento-kicker {
  display: block;
  margin-bottom: 18px;
  font-size: 8.5px;
  letter-spacing: 0.22em;
  color: var(--teal);
}

.bento-card h3 {
  margin: 0 0 12px;
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: #f4f2eb;
}

.bento-card p {
  max-width: 460px;
  font-size: 13px;
  line-height: 1.85;
  color: #9fb6bb;
}

.bento-visual {
  position: relative;
  z-index: 1;
  margin-top: 22px;
}

.bento-visual svg {
  width: 100%;
  height: auto;
}

.hourly-visual svg {
  max-height: 200px;
}

.chart-window {
  fill: rgba(201, 164, 92, 0.07);
  stroke: rgba(201, 164, 92, 0.25);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.chart-window-soft {
  fill: rgba(62, 198, 196, 0.04);
  stroke: rgba(62, 198, 196, 0.16);
}

.chart-axis {
  stroke: rgba(184, 233, 228, 0.12);
  stroke-width: 1;
}

.chart-area {
  fill: rgba(62, 198, 196, 0.09);
}

.chart-line {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

html.js-ready .chart-line,
html.js-ready .tide-line {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

html.js-ready .is-revealed .chart-line,
html.js-ready .is-revealed .tide-line {
  animation: drawLine 1.8s cubic-bezier(0.22, 0.61, 0.36, 1) 0.15s forwards;
}

html.js-ready .hero .tide-line {
  animation: drawLine 2s cubic-bezier(0.22, 0.61, 0.36, 1) 0.5s both;
}

.chart-dot {
  fill: var(--teal-bright);
  filter: drop-shadow(0 0 6px rgba(125, 235, 228, 0.7));
}

.chart-dot-soft {
  opacity: 0.5;
}

.chart-caption {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.08em;
  fill: var(--brass-bright);
}

.chart-hours {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 7.5px;
  color: var(--mist-2);
}

.map-land {
  fill: #24312a;
}

.map-contour {
  fill: none;
  stroke: rgba(184, 233, 228, 0.14);
  stroke-width: 1;
}

.map-contour-soft {
  opacity: 0.5;
}

.map-cast {
  stroke: var(--brass-bright);
  stroke-width: 1.2;
  stroke-dasharray: 4 4;
  fill: none;
}

.map-pulse {
  fill: none;
  stroke: rgba(62, 198, 196, 0.45);
  stroke-width: 1;
  transform-box: fill-box;
  transform-origin: center;
  animation: mapPulse 3.4s ease-out infinite;
}

.map-pulse-2 {
  animation-delay: 1.1s;
}

.map-marker {
  fill: var(--teal-bright);
  filter: drop-shadow(0 0 8px rgba(125, 235, 228, 0.8));
}

.map-cross {
  stroke: rgba(184, 233, 228, 0.35);
  stroke-width: 1;
}

.map-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  fill: rgba(184, 233, 228, 0.62);
}

.map-channel {
  fill: none;
  stroke: rgba(62, 198, 196, 0.45);
  stroke-width: 1.2;
  stroke-dasharray: 7 5;
}

.map-compass circle {
  fill: rgba(4, 17, 20, 0.5);
  stroke: rgba(184, 233, 228, 0.2);
  stroke-width: 1;
}

.map-compass path {
  fill: var(--teal);
}

.map-compass text {
  font-family: var(--font-mono);
  font-size: 7px;
  fill: rgba(184, 233, 228, 0.6);
}

.tide-mini svg {
  max-height: 96px;
}

.rose-ring {
  fill: none;
  stroke: rgba(184, 233, 228, 0.14);
  stroke-width: 1;
}

.rose-axis {
  stroke: rgba(184, 233, 228, 0.1);
  stroke-width: 1;
  stroke-dasharray: 2 5;
}

.rose-arrow {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.6;
  stroke-linecap: round;
}

.depth-band-1 {
  fill: rgba(62, 198, 196, 0.06);
}

.depth-band-2 {
  fill: rgba(62, 198, 196, 0.1);
}

.depth-band-3 {
  fill: rgba(62, 198, 196, 0.16);
}

.depth-line {
  stroke: rgba(184, 233, 228, 0.1);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.fish-glyph {
  fill: rgba(184, 233, 228, 0.82);
}

.fish-eye {
  fill: var(--abyss);
}

/* 出钓记录 */
.bento-log {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(28px, 4vw, 60px);
}

.log-board {
  width: 100%;
  padding: 18px;
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  background: rgba(4, 17, 20, 0.5);
}

.log-row {
  display: grid;
  grid-template-columns: 46px 1fr 44px 1.4fr;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 11.5px;
}

.log-time {
  font-size: 9.5px;
  color: var(--mist-2);
}

.log-species {
  color: var(--sea-glass);
}

.log-result {
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.log-result-hit {
  color: var(--teal-bright);
}

.log-result-miss {
  color: #70868c;
}

.log-bar {
  display: block;
  height: 3px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.log-bar-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--teal);
}

.log-bar-1 {
  width: 34%;
  opacity: 0.55;
}

.log-bar-2 {
  width: 72%;
}

.log-bar-3 {
  width: 18%;
  opacity: 0.3;
}

.log-foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  font-size: 7.5px;
  letter-spacing: 0.14em;
  color: var(--mist-2);
}

.log-loop {
  color: var(--teal);
}

/* ---------------------------------------------------------------------------
   11. 精准模式
   --------------------------------------------------------------------------- */
.precise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(50px, 7vw, 100px);
}

.precise-copy h2 {
  margin-top: 20px;
}

.precise-list {
  margin: 40px 0 36px;
  border-top: 1px solid var(--line-dark);
}

.precise-list li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-dark);
}

.precise-index {
  padding-top: 4px;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.precise-list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.precise-list p {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
}

.precise-visual {
  position: relative;
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 640px;
  margin-inline: auto;
  padding: 20px 0;
}

.precise-visual::before {
  content: "";
  position: absolute;
  inset: 6% 4%;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(62, 198, 196, 0.13), transparent 66%);
  filter: blur(30px);
}

.phone {
  position: relative;
  z-index: 2;
  width: min(320px, 78%);
  filter: drop-shadow(0 44px 70px rgba(0, 0, 0, 0.5));
}

.phone-frame {
  position: relative;
  aspect-ratio: 320 / 660;
  border: 8px solid #0b1b1f;
  border-radius: 44px;
  background: #0b1b1f;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 0 0 1px rgba(184, 233, 228, 0.14);
  overflow: hidden;
}

.phone-screen {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 34px 12px 12px;
  border-radius: 36px;
  overflow: hidden;
  background: #06181d;
}

.phone-screen::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 50%;
  width: 84px;
  height: 20px;
  border-radius: 999px;
  background: #0b1b1f;
  transform: translateX(-50%);
  z-index: 6;
}

.phone-status {
  display: flex;
  justify-content: space-between;
  margin-bottom: 9px;
  font-size: 7px;
  letter-spacing: 0.16em;
  color: rgba(184, 233, 228, 0.48);
}

.zoom-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 7.5px;
  text-align: center;
  color: var(--mist);
}

.zoom-switch span {
  padding: 5px 0;
  border-radius: 6px;
  white-space: nowrap;
}

.zoom-switch .is-active {
  background: rgba(62, 198, 196, 0.16);
  color: var(--teal-bright);
  box-shadow: inset 0 0 0 1px rgba(62, 198, 196, 0.3);
}

.mini-map {
  position: relative;
  flex: 1;
  min-height: 0;
  margin-top: 10px;
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  overflow: hidden;
}

.mini-map svg {
  width: 100%;
  height: 100%;
}

.mini-map .map-label {
  font-size: 10px;
}

.phone-sheet {
  margin-top: 10px;
  padding: 12px;
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  background: rgba(4, 17, 20, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sheet-title {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.phone-sheet .golden-tag {
  padding: 2px 6px;
  font-size: 7px;
}

.sheet-rows {
  margin-top: 7px;
}

.sheet-row {
  display: flex;
  gap: 10px;
  padding: 5px 0;
  border-top: 1px solid rgba(184, 233, 228, 0.08);
  font-size: 9px;
  line-height: 1.5;
  color: #b8cbcd;
}

.sheet-k {
  flex: none;
  width: 30px;
  font-size: 8px;
  color: var(--mist-2);
}

.float-card {
  position: absolute;
  z-index: 3;
  right: -18px;
  bottom: -48px;
  width: 218px;
  padding: 16px 18px;
  border: 1px solid rgba(62, 198, 196, 0.28);
  border-radius: 14px;
  background: rgba(9, 30, 36, 0.92);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.42);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.float-k {
  display: block;
  margin-bottom: 8px;
  font-size: 7.5px;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.float-card p {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.75;
  color: #c7d8d9;
}

/* ---------------------------------------------------------------------------
   12. 判断流程
   --------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-light);
}

.step {
  position: relative;
  padding: 30px 30px 0 0;
}

.step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px var(--paper);
}

.step-num {
  display: block;
  margin-bottom: 26px;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--teal-deep);
}

.step h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--paper-ink);
}

.step p {
  max-width: 220px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--paper-muted);
}

.how-note {
  max-width: 680px;
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line-light);
  font-size: 12px;
  line-height: 1.8;
  color: var(--paper-muted);
}

/* ---------------------------------------------------------------------------
   13. 规格带
   --------------------------------------------------------------------------- */
.spec-strip {
  padding: 56px 0;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  background:
    radial-gradient(700px 300px at 50% 50%, rgba(62, 198, 196, 0.05), transparent 70%),
    #071c21;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.spec-item {
  display: grid;
  grid-template-columns: auto auto;
  justify-content: start;
  align-items: baseline;
  gap: 4px 6px;
  padding-left: clamp(18px, 3vw, 40px);
  border-left: 1px solid var(--line-dark);
}

.spec-item:first-child {
  padding-left: 0;
  border-left: 0;
}

.spec-num {
  font-family: var(--font-display);
  font-size: clamp(44px, 5vw, 68px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.01em;
  color: #f4f2eb;
  font-variant-numeric: tabular-nums;
}

.spec-unit {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.spec-label {
  grid-column: 1 / -1;
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------------------------------------------------------------------------
   14. 使用与解锁
   --------------------------------------------------------------------------- */
.access-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.access-card {
  padding: 32px 28px;
  border: 1px solid var(--line-light);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.38);
}

.access-card-accent {
  border-color: transparent;
  background: var(--ink);
  color: var(--paper);
}

.access-kicker {
  display: block;
  margin-bottom: 24px;
  font-size: 8.5px;
  letter-spacing: 0.22em;
  color: var(--teal-deep);
}

.access-card-accent .access-kicker {
  color: var(--teal-bright);
}

.access-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--paper-ink);
}

.access-card-accent h3 {
  color: var(--paper);
}

.access-card p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--paper-muted);
}

.access-card-accent p {
  color: #b8cbcd;
}

.access-note {
  margin-top: 28px;
  font-size: 11px;
  color: var(--paper-muted);
  text-align: right;
}

/* ---------------------------------------------------------------------------
   15. 开始 / 平台
   --------------------------------------------------------------------------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 900px;
  margin: 0 auto;
}

.platform-card {
  padding: clamp(26px, 3vw, 34px);
  border: 1px solid var(--line-dark);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.4s ease, background 0.4s ease, transform 0.4s ease;
}

.platform-card:hover {
  border-color: rgba(62, 198, 196, 0.35);
  background: rgba(255, 255, 255, 0.045);
  transform: translateY(-3px);
}

.platform-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.platform-mark {
  display: inline-flex;
  width: 34px;
  height: 34px;
  flex: none;
}

.platform-mark svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.platform-dots {
  stroke-width: 2.6;
  stroke-linecap: round;
}

.platform-name {
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.platform-desc {
  margin-bottom: 22px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.copy-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line-dark-strong);
  border-radius: 10px;
  background: rgba(4, 17, 20, 0.5);
  color: var(--sea-glass);
  text-align: left;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.copy-btn:hover {
  border-color: rgba(62, 198, 196, 0.55);
  background: rgba(62, 198, 196, 0.05);
}

.copy-name {
  font-size: 14px;
  letter-spacing: 0.12em;
}

.copy-action {
  font-size: 8.5px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.copy-btn.is-copied .copy-action {
  color: var(--teal-bright);
}

.scan-panel {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(24px, 4vw, 46px);
  max-width: 760px;
  margin: 28px auto 0;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line-dark);
  border-radius: 20px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02));
  overflow: hidden;
}

.scan-panel::before {
  content: "";
  position: absolute;
  right: -10%;
  top: -60%;
  width: 420px;
  height: 420px;
  pointer-events: none;
  background: radial-gradient(circle, rgba(62, 198, 196, 0.12), transparent 66%);
}

.scan-qr {
  position: relative;
  z-index: 1;
  width: 200px;
  flex: none;
  padding: 12px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 22px 46px rgba(0, 0, 0, 0.32);
}

.scan-qr img {
  display: block;
  width: 100%;
  height: auto;
}

.scan-copy {
  position: relative;
  z-index: 1;
  max-width: 440px;
}

.scan-kicker {
  display: block;
  margin-bottom: 12px;
  font-size: 8.5px;
  letter-spacing: 0.22em;
  color: var(--teal);
}

.scan-copy h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--paper);
}

.scan-copy p {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
}

.scan-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--sea-glass);
}

.scan-brand img {
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(184, 233, 228, 0.3);
}

.platform-note {
  margin-top: 26px;
  font-size: 11px;
  color: var(--mist-2);
  text-align: center;
}

/* ---------------------------------------------------------------------------
   16. FAQ
   --------------------------------------------------------------------------- */
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  align-items: start;
  gap: clamp(40px, 7vw, 100px);
}

.faq-head {
  position: sticky;
  top: 120px;
}

.faq-list {
  border-top: 1px solid var(--line-light);
}

.faq-item {
  border-bottom: 1px solid var(--line-light);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--paper-ink);
  transition: color 0.25s ease;
}

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

.faq-item summary:hover {
  color: var(--teal-deep);
}

.faq-icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--teal-deep);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.faq-icon::before {
  width: 12px;
  height: 1px;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 1px;
  height: 12px;
  transform: translate(-50%, -50%);
}

.faq-item[open] .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-body p {
  max-width: 620px;
  margin: 0 0 24px;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--paper-muted);
}

/* ---------------------------------------------------------------------------
   17. 收尾 CTA
   --------------------------------------------------------------------------- */
.final-cta {
  position: relative;
  padding: clamp(100px, 13vw, 176px) 0;
  overflow: hidden;
  border-top: 1px solid var(--line-dark);
  background: var(--abyss);
  text-align: center;
}

.final-glow {
  position: absolute;
  left: 50%;
  bottom: -42%;
  width: min(1000px, 120vw);
  height: 620px;
  transform: translateX(-50%);
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 60%, rgba(62, 198, 196, 0.2), transparent 64%),
    radial-gradient(ellipse at 58% 66%, rgba(228, 192, 126, 0.06), transparent 58%);
  filter: blur(24px);
}

.final-inner {
  max-width: 800px;
  z-index: 1;
}

.final-inner .eyebrow {
  justify-content: center;
}

.final-cta h2 {
  margin: 24px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.final-lede {
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

.final-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 38px;
}

.final-note {
  margin-top: 30px;
  font-size: 8.5px;
  letter-spacing: 0.2em;
  color: var(--mist-2);
}

/* ---------------------------------------------------------------------------
   18. 页脚
   --------------------------------------------------------------------------- */
.site-footer {
  padding: 70px 0 30px;
  border-top: 1px solid var(--line-dark);
  background: #030d10;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--line-dark);
}

.brand-footer {
  margin-bottom: 20px;
}

.footer-slogan {
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.footer-note {
  font-size: 12px;
  color: var(--mist-2);
}

.footer-col h3 {
  margin: 0 0 18px;
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--mist-2);
}

.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 12.5px;
  color: #9fb6bb;
  transition: color 0.25s ease;
}

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

.footer-col p {
  margin: 0 0 10px;
  font-size: 11.5px;
  line-height: 1.8;
  color: #7c979d;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding-top: 22px;
  font-size: 10.5px;
  color: var(--mist-2);
}

.footer-bottom a {
  transition: color 0.25s ease;
}

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

.footer-bottom-note {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.18em;
  color: rgba(111, 142, 150, 0.6);
}

/* ---------------------------------------------------------------------------
   19. Toast
   --------------------------------------------------------------------------- */
.copy-fallback {
  position: fixed;
  top: 0;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  z-index: 250;
  padding: 12px 22px;
  border: 1px solid rgba(62, 198, 196, 0.4);
  border-radius: 999px;
  background: rgba(11, 42, 55, 0.96);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.04em;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 16px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------------------------------------------------------------------------
   20. 关键帧
   --------------------------------------------------------------------------- */
@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes heroCardIn {
  from {
    opacity: 0;
    transform: translateY(26px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes drawLine {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes dialArc {
  from {
    opacity: 0;
    stroke-dasharray: 0 2000;
  }
  to {
    opacity: 1;
  }
}

@keyframes nowPulse {
  0% {
    opacity: 0.8;
    transform: scale(0.7);
  }
  70% {
    opacity: 0;
    transform: scale(1.7);
  }
  100% {
    opacity: 0;
    transform: scale(1.7);
  }
}

@keyframes mapPulse {
  0% {
    opacity: 0.8;
    transform: scale(0.55);
  }
  75% {
    opacity: 0;
    transform: scale(1.35);
  }
  100% {
    opacity: 0;
    transform: scale(1.35);
  }
}

@keyframes scrollLine {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.55);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
    transform-origin: top;
  }
}

/* ---------------------------------------------------------------------------
   21. 响应式
   --------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .dial-chip {
    min-width: 98px;
    padding: 8px 10px;
  }

  .chip-v {
    font-size: 9.5px;
  }
}

@media (max-width: 1080px) {
  .hero {
    padding-top: 150px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero-instrument {
    width: 100%;
  }

  .instrument-card {
    max-width: 600px;
    margin-inline: auto;
  }

  .hero-log {
    max-width: 640px;
  }

  .hero-scroll {
    display: none;
  }

  .bento-hourly,
  .bento-precise,
  .bento-log {
    grid-column: span 12;
  }

  .bento-small {
    grid-column: span 4;
  }

  .precise-grid {
    grid-template-columns: 1fr;
    gap: 70px;
  }

  .precise-copy {
    max-width: 720px;
  }

  .precise-visual {
    padding-bottom: 40px;
  }

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

  .faq-head {
    position: static;
  }
}

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-inner {
    height: 76px;
  }

  .site-header.is-scrolled .header-inner {
    height: 66px;
  }

  .brand-en {
    display: none;
  }

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

@media (max-width: 760px) {
  .section {
    padding: 80px 0;
  }

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

  .compare-divider {
    width: 100%;
    height: 1px;
  }

  .compare-divider span {
    top: 50%;
    left: 50%;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .why-item h3 {
    font-size: 20px;
  }

  .bento-small {
    grid-column: span 12;
  }

  .bento-log {
    grid-template-columns: 1fr;
  }

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

  .step {
    padding: 28px 20px 28px 0;
  }

  .step:nth-child(3),
  .step:nth-child(4) {
    border-top: 1px solid var(--line-light);
  }

  .step:nth-child(3)::before,
  .step:nth-child(4)::before {
    display: none;
  }

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

  .access-note {
    text-align: left;
  }

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

  .scan-panel {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .scan-copy {
    max-width: 380px;
  }

  .scan-brand {
    justify-content: center;
  }

  .scan-qr {
    width: 180px;
  }

  .spec-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 0;
  }

  .spec-item:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .float-card {
    position: static;
    width: min(340px, 100%);
    margin: 26px auto 0;
  }

  .precise-visual {
    flex-direction: column;
    align-items: center;
  }

  .phone {
    width: min(310px, 86%);
  }
}

@media (max-width: 640px) {
  .header-cta {
    display: none;
  }

  .hero {
    padding-top: 128px;
    padding-bottom: 72px;
  }

  .hero h1 {
    font-size: clamp(40px, 11vw, 54px);
  }

  .hero .lede {
    font-size: 14.5px;
  }

  .hero-actions {
    gap: 12px;
  }

  .hero-actions .btn-primary {
    width: 100%;
  }

  .hero-actions .btn-text {
    align-self: center;
  }

  .hero-log {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 20px;
    margin-top: 42px;
  }

  .dial-chip {
    display: none;
  }

  .instrument-card {
    padding: 16px 14px 14px;
    border-radius: 20px;
  }

  .dial-value {
    font-size: 56px;
  }

  .dial-species {
    font-size: 10px;
  }

  .tide-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .instrument-foot {
    text-align: left;
  }

  .hero-instrument {
    animation-delay: 0.1s;
  }

  .compare-panel {
    padding: 26px 22px;
  }

  .compare-quote {
    font-size: 22px;
  }

  .bento-card {
    padding: 22px 20px;
    min-height: 220px;
  }

  .bento-card h3 {
    font-size: 21px;
  }

  .chart-hours {
    font-size: 7px;
  }

  .precise-list li {
    grid-template-columns: 34px 1fr;
    gap: 12px;
  }

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

  .step {
    padding: 26px 0 26px 22px;
    border-top: 1px solid var(--line-light);
  }

  .step:first-child {
    border-top: 0;
  }

  .step::before {
    top: 32px;
    left: -4px;
    display: block !important;
  }

  .step:nth-child(3),
  .step:nth-child(4) {
    border-top: 1px solid var(--line-light);
  }

  .step:nth-child(3)::before,
  .step:nth-child(4)::before {
    display: block;
  }

  .step p {
    max-width: none;
  }

  .spec-item {
    padding-left: 18px;
  }

  .spec-item:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .final-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .final-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

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

@media (max-width: 420px) {
  .hero h1 {
    font-size: 38px;
  }

  .eyebrow {
    font-size: 9px;
    letter-spacing: 0.2em;
  }

  .section-lede {
    font-size: 14.5px;
  }

  .dial-value {
    font-size: 50px;
  }

  .dial-label {
    font-size: 8.5px;
  }

  .dial-badge {
    margin-top: 9px;
    font-size: 8.5px;
  }

  .dial-species {
    margin-top: 8px;
    font-size: 9px;
  }

  .instrument-top {
    font-size: 7.5px;
  }

  .spec-item {
    padding-left: 14px;
  }

  .spec-num {
    font-size: 42px;
  }
}

/* ---------------------------------------------------------------------------
   22. 减少动态
   --------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  html.js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }

  html.js-ready .chart-line,
  html.js-ready .tide-line {
    stroke-dashoffset: 0;
  }
}