:root {
  --forest: #143c29;
  --forest-deep: #0a291b;
  --lime: #c6e84a;
  --lime-ink: #243208;
  --coral: #e75943;
  --coral-deep: #cf4330;
  --cream: #f4f7f1;
  --paper: #fbfff8;
  --ink: #152018;
  --text: #3d4a40;
  --mute: #687068;
  --line: #c9cebd;
  --white: #ffffff;
  --header: 78px;
  --w: 1200px;
  --shadow: 0 22px 50px rgba(10, 41, 27, 0.14);
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header); }
body {
  margin: 0;
  min-width: 320px;
  padding-top: var(--header);
  color: var(--text);
  background: var(--cream);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; cursor: pointer; color: inherit; }
img { display: block; max-width: 100%; height: auto; }
ul, ol, p, h1, h2, h3, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; }

.wrap { width: min(var(--w), calc(100% - 80px)); margin-inline: auto; }

/* header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header);
  background: rgba(251, 255, 248, 0.92);
  border-bottom: 1px solid rgba(20, 60, 41, 0.1);
  backdrop-filter: blur(12px);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.brand img { width: 40px; height: 40px; border-radius: 11px; }
.brand strong { display: block; font-size: 18px; font-weight: 900; line-height: 1.1; }
.brand small { display: block; margin-top: 2px; font-size: 11px; color: var(--mute); font-weight: 600; }
.nav {
  margin-left: auto;
  display: flex;
  gap: 22px;
  font-size: 14px;
  font-weight: 650;
  color: var(--text);
}
.nav a:hover { color: var(--coral); }
.header-cta {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  background: var(--forest);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}
.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--white);
  font-size: 22px;
}

/* hero — 两侧大留白，文案与手机成组，避免贴边/中间空一截 */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header));
  display: flex;
  align-items: center;
  padding: 64px clamp(48px, 9vw, 140px) 72px;
  overflow: hidden;
  background:
    linear-gradient(115deg, #f3f8f1 0%, var(--cream) 42%, #e7f0e4 100%);
}
.hero-glow {
  position: absolute;
  right: 8%;
  top: -10%;
  width: min(640px, 55vw);
  height: min(640px, 55vw);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(198, 232, 74, 0.35) 0%, rgba(20, 60, 41, 0.12) 42%, transparent 70%);
  pointer-events: none;
}
.hero-word {
  position: absolute;
  left: clamp(48px, 9vw, 140px);
  top: 12%;
  font-size: clamp(96px, 16vw, 200px);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 0.85;
  color: rgba(20, 60, 41, 0.07);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}
.hero-stage {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(300px, 520px) auto;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  justify-content: space-between;
}
.hero-copy {
  max-width: 520px;
  padding-right: 0;
}
.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--coral-deep);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
}
.hero h1 {
  color: var(--ink);
  font-size: clamp(48px, 7vw, 76px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.04em;
}
.hero-slogan {
  margin-top: 18px;
  color: var(--forest);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.35;
}
.hero-desc {
  margin-top: 18px;
  color: var(--mute);
  font-size: 16px;
  line-height: 1.85;
  max-width: 32em;
}

.hero-downloads {
  display: grid;
  gap: 12px;
  margin-top: 28px;
  max-width: 420px;
}
.hero-downloads .dl-main {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: center;
  min-height: 72px;
  padding: 12px 16px;
  border-radius: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 12px 28px rgba(20, 60, 41, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.hero-downloads .dl-main:hover {
  transform: translateY(-2px);
  border-color: rgba(231, 89, 67, 0.4);
}
.hero-downloads .dl-main i {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--forest);
  color: var(--lime);
  font-size: 22px;
}
.hero-downloads .dl-main:nth-child(2) i {
  background: var(--coral);
  color: #fff;
}
.hero-downloads strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
}
.hero-downloads small {
  display: block;
  margin-top: 3px;
  color: var(--mute);
  font-size: 12px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 4px 2px 0;
  color: var(--mute);
  font-size: 12px;
  font-weight: 600;
}

.phone-visual {
  position: relative;
  display: grid;
  place-items: center;
  justify-self: end;
  min-height: 520px;
  width: min(340px, 100%);
}
.phone-orbit {
  position: absolute;
  width: 120%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(20, 60, 41, 0.08);
  border: 1px solid rgba(20, 60, 41, 0.08);
}
.phone-shell {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 320px;
  padding: 12px;
  border-radius: 36px;
  background: linear-gradient(180deg, #1d3d2c, #0f2418);
  box-shadow: 0 28px 60px rgba(10, 41, 27, 0.28);
  animation: floaty 5.8s ease-in-out infinite;
}
.phone-screen {
  border-radius: 26px;
  overflow: hidden;
  background: #eef2ef;
}
.phone-screen img {
  width: 100%;
  height: auto;
}

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

/* features — 三列 */
.features {
  padding: 72px 0;
  background: var(--forest);
  color: #eef6f0;
}
.features .sec-label { color: var(--lime); }
.features h2 { color: #fff; }
.features .sec-desc { color: rgba(238, 246, 240, 0.72); }
.feature-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.feature-columns article {
  padding: 24px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.feature-columns span {
  display: block;
  margin-bottom: 14px;
  color: var(--lime);
  font-size: 13px;
  font-weight: 900;
}
.feature-columns h3 {
  margin-bottom: 10px;
  color: #fff;
  font-size: 20px;
}
.feature-columns p {
  color: rgba(238, 246, 240, 0.72);
  font-size: 14px;
  line-height: 1.75;
}

.sec-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}
.sec-head {
  max-width: 40em;
}
.sec-head.center {
  text-align: center;
  margin-inline: auto;
}
.sec-head h2 {
  color: var(--ink);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.2;
}
.sec-desc {
  margin-top: 12px;
  color: var(--mute);
  font-size: 15px;
  line-height: 1.8;
}

/* interfaces — 横滑轨 */
.interfaces {
  padding: 80px 0;
}
.interface-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 28px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x mandatory;
}
.interface-track figure {
  min-width: 0;
  scroll-snap-align: start;
  border-radius: 18px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
}
.interface-track img {
  width: 100%;
  height: auto;
  background: #eef2ef;
}
.interface-track figcaption {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px 14px;
}
.interface-track b {
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
}
.interface-track strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
}
.interface-track small {
  display: block;
  margin-top: 2px;
  color: var(--mute);
  font-size: 12px;
}

/* clean band */
.clean-band {
  padding: 72px 0;
  background: var(--white);
  border-block: 1px solid var(--line);
}
.clean-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}
.clean-points {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}
.clean-points li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
}
.clean-points i { color: var(--coral); font-size: 18px; }
.clean-panel {
  padding: 26px;
  border-radius: 24px;
  background:
    linear-gradient(160deg, rgba(198, 232, 74, 0.35), transparent 55%),
    var(--forest);
  color: #fff;
  box-shadow: var(--shadow);
}
.clean-panel h3 {
  margin-bottom: 10px;
  font-size: 24px;
}
.clean-panel p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  line-height: 1.75;
}
.clean-panel ul {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.clean-panel li {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--lime);
  font-size: 12px;
  font-weight: 700;
}

/* path — 竖向时间线，区别上一站三列步骤卡 */
.path {
  padding: 80px 0;
  background:
    linear-gradient(180deg, #0f2a1c 0%, var(--forest) 100%);
  color: #eef6f0;
}
.path .sec-label { color: var(--lime); }
.path-head {
  max-width: 36em;
  margin-bottom: 36px;
}
.path-head h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1.2;
}
.path-head p {
  margin: 12px 0 0;
  color: rgba(238, 246, 240, 0.72);
  font-size: 15px;
  line-height: 1.8;
}
.path-line {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 2px solid rgba(198, 232, 74, 0.35);
}
.path-line li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
  padding: 0 0 28px 28px;
  position: relative;
}
.path-line li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 232, 74, 0.2);
}
.path-line b {
  color: var(--lime);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  padding-top: 4px;
}
.path-line h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 18px;
}
.path-line p {
  margin: 0;
  color: rgba(238, 246, 240, 0.72);
  font-size: 14px;
  line-height: 1.75;
}

/* voices — 整屏大气，与 features / path 同一套 */
.voices {
  padding: 96px 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(198, 232, 74, 0.12), transparent 40%),
    linear-gradient(180deg, #eef4eb 0%, var(--cream) 100%);
}
.voices .sec-head {
  max-width: 44em;
  margin-inline: auto;
  text-align: center;
  margin-bottom: 40px;
}
.voices .sec-head h2 {
  font-size: clamp(32px, 4vw, 44px);
}
.voice-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.voice-row {
  display: grid;
  gap: 10px;
  padding: 28px 26px;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(20, 60, 41, 0.1);
  min-height: 180px;
}
.voice-row:first-child {
  grid-column: 1 / -1;
  min-height: 0;
  padding: 32px 34px;
  background: var(--forest);
  border-color: transparent;
  color: #eef6f0;
}
.voice-row:first-child time,
.voice-row:first-child strong { color: var(--lime); }
.voice-row:first-child p { color: rgba(238, 246, 240, 0.86); }
.voice-row time {
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.voice-row strong {
  display: block;
  color: var(--ink);
  font-size: 17px;
}
.voice-row p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
}

/* help — 整屏答疑，对齐深绿大区块节奏 */
.help {
  padding: 96px 0;
  background: var(--forest);
  color: #eef6f0;
}
.help-inner {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.2fr);
  gap: 48px;
  align-items: start;
}
.help-banner {
  padding: 0;
  background: transparent;
  color: #fff;
  position: sticky;
  top: calc(var(--header) + 24px);
}
.help-banner .sec-label { color: var(--lime); }
.help-banner h2 {
  margin: 12px 0 16px;
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.15;
}
.help-banner p {
  margin: 0;
  color: rgba(238, 246, 240, 0.72);
  font-size: 16px;
  line-height: 1.8;
  max-width: 18em;
}
.help-board {
  background: transparent;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.help-board details {
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.help-board details:last-child { border-bottom: 1px solid rgba(255, 255, 255, 0.14); }
.help-board summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 4px;
  color: #fff;
  font-weight: 750;
  font-size: 17px;
}
.help-board summary::-webkit-details-marker { display: none; }
.help-board summary::after {
  content: "+";
  float: right;
  color: var(--lime);
  font-weight: 900;
  font-size: 20px;
}
.help-board details[open] summary::after { content: "–"; }
.help-board details p {
  margin: 0;
  padding: 0 4px 22px;
  color: rgba(238, 246, 240, 0.72);
  font-size: 15px;
  line-height: 1.8;
}

/* get — 真正整屏下载带，不再缩成小卡片 */
.get {
  padding: 110px 0;
  background:
    radial-gradient(circle at 50% -10%, rgba(198, 232, 74, 0.22), transparent 48%),
    linear-gradient(180deg, var(--forest-deep), #06140e);
  color: #fff;
  text-align: center;
}
.get-box {
  padding: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  max-width: 760px;
  margin-inline: auto;
}
.get-kicker {
  margin: 0 0 14px;
  color: var(--lime);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
}
.get-box h2 {
  margin: 0 0 16px;
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 900;
  line-height: 1.15;
}
.get-box > p {
  margin: 0 auto 32px;
  max-width: 34em;
  color: rgba(255, 255, 255, 0.74);
  font-size: 16px;
  line-height: 1.8;
}
.get-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.get-actions .btn {
  min-height: 56px;
  min-width: 180px;
  font-size: 15px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 800;
}
.btn-primary {
  color: #fff;
  background: var(--coral);
  box-shadow: 0 12px 26px rgba(231, 89, 67, 0.28);
}
.btn-secondary {
  color: var(--ink);
  background: var(--cream);
  border: 1px solid var(--line);
}
.btn-lime {
  color: var(--lime-ink);
  background: var(--lime);
}
.btn-ghost-light {
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

/* footer */
.site-footer {
  padding: 40px 0 52px;
  border-top: 1px solid var(--line);
  background: var(--white);
}
.site-footer-dark {
  background: #0c1f16;
  border-top: 0;
  color: rgba(238, 246, 240, 0.78);
}
.footer-stack {
  display: grid;
  gap: 14px;
  justify-items: start;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 800;
}
.footer-brand img { width: 34px; height: 34px; border-radius: 9px; }
.site-footer p {
  margin: 0;
  max-width: 40em;
  font-size: 13px;
  line-height: 1.7;
}
.site-footer-dark p { color: rgba(238, 246, 240, 0.65); }
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  font-size: 13px;
  font-weight: 600;
}
.site-footer-dark nav a { color: rgba(238, 246, 240, 0.82); }
.copy { font-size: 12px !important; }

#interaction-complaint-button {
  color: #1f2430 !important;
  font-weight: 700;
}
#interaction-complaint-button:hover { color: #1f2430 !important; }
.backtop {
  position: fixed;
  right: 24px;
  bottom: 84px;
  z-index: 40;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--forest);
  color: #fff;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.backtop.on { opacity: 1; pointer-events: auto; }

.fade {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade.in { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .wrap { width: min(var(--w), calc(100% - 40px)); }
  .hero {
    min-height: 0;
    align-items: stretch;
    padding: 36px 24px 48px;
  }
  .hero-stage,
  .clean-grid,
  .help-inner,
  .voice-strip {
    grid-template-columns: 1fr;
    gap: 28px;
    justify-content: stretch;
  }
  .voice-row:first-child { grid-column: auto; }
  /* 移动端：文案+下载在上，截图在下 */
  .hero-copy { order: 1; max-width: none; }
  .phone-visual {
    order: 2;
    min-height: 0;
    justify-self: center;
    width: min(280px, 78%);
  }
  .hero-downloads { max-width: none; }
  .hero-downloads .dl-main { min-height: 64px; }
  .phone-shell { max-width: none; }
  .feature-columns {
    grid-template-columns: 1fr;
  }
  .path-line li {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-left: 24px;
  }
  .help-banner { position: static; }
  .interface-track {
    grid-auto-flow: column;
    grid-template-columns: repeat(4, minmax(220px, 70vw));
  }
  .nav {
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 10px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; }
  .menu-btn { display: grid; place-items: center; margin-left: auto; }
  .header-cta { display: none; }
  .voices,
  .help,
  .get { padding: 72px 0; }
  .backtop { right: 16px; bottom: 76px; }
}