/* 瓶瓶官网 · 落地页专用样式(基础见 site.css) */

section { position: relative; }
.section { padding: clamp(64px, 10vw, 120px) 0 0; }
.center { text-align: center; max-width: 720px; margin: 0 auto; }
.h2 { font-size: clamp(30px, 5.4vw, 48px); line-height: 1.16; font-weight: 800; margin: 14px 0 0; }
:lang(en) .h2 { line-height: 1.1; }
.sub { font-size: clamp(16px, 2vw, 18px); color: var(--ink-2); margin: 16px auto 0; max-width: 38em; }
.grad {
  background: linear-gradient(100deg, var(--blue) 10%, #6AA9F7 55%, #F28DAA 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
@media (prefers-color-scheme: dark) {
  .grad { background-image: linear-gradient(100deg, #8EC3FC 10%, #B7D7FD 50%, #FFB6C8 100%); }
}

/* 滚动进度 */
.progress {
  position: fixed; left: 0; top: 0; right: 0; height: 2px; z-index: 60;
  background: linear-gradient(90deg, var(--sky), var(--blue), var(--pink));
  transform-origin: 0 50%; transform: scaleX(0);
}

/* ---------- 手机外框 ---------- */
.device {
  position: relative; width: 100%;
  padding: 3.4%; border-radius: 15% / 7%;
  background: linear-gradient(145deg, #2A3242, #0E131C 45%, #1E2532);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .06) inset, 0 1px 0 1px rgba(0, 0, 0, .25), var(--shadow-lg);
}
.device::before { /* 灵动岛 */
  content: ""; position: absolute; z-index: 2; left: 50%; top: 4.6%; width: 28%; height: 3%;
  transform: translateX(-50%); border-radius: 999px; background: #05070B;
}
.device img {
  width: 100%; aspect-ratio: 600 / 1304; object-fit: cover; object-position: top;
  border-radius: 12% / 5.6%; background: var(--bg);
}

/* ---------- 首屏 ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 48px; align-items: center;
  padding: clamp(28px, 6vw, 72px) 0 0;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 14px; color: var(--ink-2);
  padding: 5px 14px 5px 5px; border-radius: 999px;
}
.eyebrow b {
  background: linear-gradient(135deg, var(--blue), #5B95EC); color: #fff; font-weight: 600;
  padding: 3px 10px; border-radius: 999px; font-size: 13px;
}
.hero h1 {
  font-size: clamp(42px, 8.4vw, 76px); line-height: 1.06; font-weight: 850; margin: 20px 0 0;
  letter-spacing: -.02em;
}
:lang(en) .hero h1 { letter-spacing: -.035em; line-height: 1.02; font-size: clamp(40px, 6.4vw, 68px); }
.hero .lead { font-size: clamp(17px, 2.2vw, 19.5px); line-height: 1.7; color: var(--ink-2); margin: 22px 0 0; max-width: 32em; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.checks { display: flex; flex-wrap: wrap; gap: 8px 18px; list-style: none; padding: 0; margin: 22px 0 0; font-size: 14.5px; color: var(--ink-2); }
.checks li { display: inline-flex; align-items: center; gap: 6px; }
.checks svg { width: 16px; height: 16px; color: var(--blue-ink); flex-shrink: 0; }

.stage { position: relative; width: min(100%, 420px); margin: 0 auto; padding: 24px 0 36px; }
.stage .halo {
  position: absolute; inset: 6% 0 10%; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(125, 188, 251, .55), rgba(255, 182, 200, .28) 60%, transparent);
  filter: blur(20px);
}
.stage .device { width: 72%; margin: 0 auto; }
.chip {
  position: absolute; z-index: 3; display: flex; align-items: center; gap: 10px;
  padding: 10px 14px 10px 10px; border-radius: 18px;
  font-size: 13.5px; font-weight: 600; line-height: 1.35; color: var(--ink);
  max-width: 230px;
}
.chip span { display: block; font-weight: 400; font-size: 12px; color: var(--ink-3); }
.chip .ico {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 11px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--sky), var(--blue));
}
.chip .ico svg { width: 18px; height: 18px; }
.chip .ico.sun { background: linear-gradient(135deg, #FFD27A, #F59E3A); }
.chip .ico.pink { background: linear-gradient(135deg, #FFC9D6, #F2809F); }
.chip-1 { left: -6%; top: 20%; }
.chip-2 { right: -8%; top: 46%; }
.chip-3 { left: -2%; bottom: 14%; }
.stage .peek { position: absolute; z-index: 4; right: 2%; bottom: 0; width: 92px; filter: drop-shadow(0 12px 18px rgba(47, 111, 214, .25)); }
@media (prefers-reduced-motion: no-preference) {
  .float { animation: float 6s ease-in-out infinite; }
  .chip-2.float { animation-delay: -2s; }
  .chip-3.float { animation-delay: -4s; }
  @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
  .intro { opacity: 0; transform: translateY(16px); animation: intro .9s var(--ease) forwards; animation-delay: calc(var(--d, 0) * 90ms + 80ms); }
  @keyframes intro { to { opacity: 1; transform: none; } }
}
@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 16px; text-align: center; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero .cta, .checks { justify-content: center; }
  .stage { width: min(100%, 360px); }
}
@media (max-width: 480px) {
  .hero .cta .btn { flex: 1 1 100%; }
  .chip { font-size: 12.5px; padding: 8px 10px 8px 8px; gap: 8px; border-radius: 15px; max-width: 180px; }
  .chip .ico { width: 28px; height: 28px; border-radius: 9px; }
  .chip span { font-size: 11px; }
  .chip-1 { left: 0; top: 16%; }
  .chip-2 { right: 0; top: 46%; }
  .chip-3 { left: 0; bottom: 16%; }
  .stage .peek { width: 70px; right: 0; }
}

/* ---------- 痛点 ---------- */
.shelf {
  margin-top: 48px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 0; overflow: hidden; align-items: stretch;
}
.shelf .text { padding: clamp(24px, 4vw, 48px); }
.shelf h3 { font-size: clamp(21px, 2.6vw, 26px); line-height: 1.35; font-weight: 750; }
.shelf .text > p { color: var(--ink-2); margin: 10px 0 18px; }
.pain { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.pain li {
  display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border-radius: 14px;
  background: var(--surface-2); border: 1px solid var(--line); font-size: 15.5px; line-height: 1.55;
}
.pain li svg { flex-shrink: 0; width: 20px; height: 20px; margin-top: 1px; color: var(--blue-ink); }
.shelf .pic { position: relative; min-height: 260px; background: linear-gradient(160deg, var(--tint), var(--tint-pink)); display: grid; place-items: center; overflow: hidden; }
.shelf .pic img { width: 92%; max-width: 560px; }
@media (max-width: 820px) { .shelf { grid-template-columns: minmax(0, 1fr); } .shelf .pic { min-height: 0; padding: 24px 0; } }

/* ---------- 三步 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 48px; counter-reset: st; }
.step { padding: 28px 24px 26px; position: relative; overflow: hidden; }
.step .n {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: var(--blue-ink); letter-spacing: .04em;
}
.step .n i {
  font-style: normal; width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--sky), var(--blue));
}
.step img { height: 116px; width: auto; margin: 18px 0 14px; filter: drop-shadow(0 10px 16px rgba(47, 111, 214, .18)); }
.step h3 { font-size: 20px; line-height: 1.35; font-weight: 750; }
.step p { color: var(--ink-2); font-size: 15.5px; margin: 8px 0 0; }
@media (max-width: 820px) {
  .steps { grid-template-columns: minmax(0, 1fr); }
  .step { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 0 16px; align-items: start; padding: 22px 20px; }
  .step .n { grid-column: 1 / -1; margin-bottom: 8px; }
  .step img { height: 92px; width: auto; margin: 0 auto; grid-row: span 2; }
}

/* ---------- 功能 ---------- */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px; margin-top: 48px; }
.tile {
  position: relative; overflow: hidden; padding: 28px;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  --mx: 50%; --my: 0%;
}
.tile::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(125, 188, 251, .16), transparent 60%);
}
.tile:hover::after { opacity: 1; }
.tile h3 { font-size: clamp(20px, 2.4vw, 24px); line-height: 1.32; font-weight: 750; margin-top: 12px; }
.tile p { color: var(--ink-2); font-size: 15.5px; margin: 10px 0 0; }
.tile .bul { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; font-size: 15px; color: var(--ink-2); }
.tile .bul li { display: flex; gap: 8px; align-items: flex-start; line-height: 1.5; }
.tile .bul li::before { content: ""; flex-shrink: 0; width: 6px; height: 6px; margin-top: .55em; border-radius: 50%; background: linear-gradient(135deg, var(--sky), var(--blue)); }

.t-shot { grid-column: span 3; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 20px; padding-bottom: 0; align-items: start; }
.t-shot .device { margin-top: 4px; transform: translateY(18%); width: 100%; max-width: 230px; justify-self: end; }
.t-shot .text { padding-bottom: 28px; }
.t-wide { grid-column: span 6; grid-template-columns: minmax(0, 1fr) minmax(0, .6fr); }
.t-wide .device { max-width: 250px; justify-self: center; transform: translateY(10%); }
.t-wide .text { align-self: center; max-width: 34em; }
.mascots { display: flex; gap: 14px; align-items: flex-end; margin-top: 22px; }
.mascots img { height: 84px; width: auto; filter: drop-shadow(0 10px 14px rgba(47, 111, 214, .16)); }
@media (max-width: 640px) { .mascots { display: none; } }
.t-small { grid-column: span 2; }
.t-small .mascot { position: absolute; right: 14px; bottom: 10px; width: 64px; opacity: .95; }
.t-small.has-m { padding-bottom: 80px; }
.t-third { grid-column: span 2; }

.t-sky { background: linear-gradient(160deg, var(--surface) 40%, var(--tint)); }
.t-pink { background: linear-gradient(160deg, var(--surface) 40%, var(--tint-pink)); }

@media (max-width: 980px) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .t-shot, .t-wide { grid-column: span 2; }
  .t-small, .t-third { grid-column: span 1; }
}
@media (max-width: 640px) {
  .bento { grid-template-columns: minmax(0, 1fr); }
  .t-shot, .t-wide, .t-small, .t-third { grid-column: auto; }
  .tile { padding: 22px 20px; }
  .t-shot, .t-wide { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .t-shot .device, .t-wide .device { justify-self: center; max-width: 220px; width: 70%; transform: none; margin: 8px auto -36%; }
  .t-shot .text { padding-bottom: 8px; }
  .t-shot { padding-bottom: 0; }
}

/* 更多能力:小格子 */
.minis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.mini { padding: 20px; border-radius: var(--r); }
.mini .ico {
  width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; color: var(--blue-ink);
  background: var(--tint);
}
.mini .ico svg { width: 20px; height: 20px; }
.mini h3 { font-size: 16.5px; font-weight: 700; margin-top: 12px; line-height: 1.4; }
.mini p { font-size: 14.5px; color: var(--ink-2); margin: 6px 0 0; line-height: 1.6; }
@media (max-width: 980px) { .minis { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .minis { grid-template-columns: minmax(0, 1fr); gap: 10px; } .mini { padding: 18px; display: grid; grid-template-columns: 38px minmax(0, 1fr); gap: 0 14px; } .mini .ico { grid-row: span 2; } .mini h3 { margin-top: 0; } }

/* ---------- 截图长廊 ---------- */
.gallery {
  display: flex; gap: 20px; margin-top: 40px; padding: 8px var(--gutter) 28px;
  overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-left: calc(var(--gutter) * -1); margin-right: calc(var(--gutter) * -1);
}
.gallery::-webkit-scrollbar { display: none; }
.gallery figure { margin: 0; flex: 0 0 auto; width: 210px; scroll-snap-align: center; text-align: center; }
.gallery figcaption { font-size: 14px; color: var(--ink-2); margin-top: 14px; font-weight: 500; }
@media (min-width: 1160px) { .gallery { justify-content: center; overflow: visible; } .gallery figure { width: 168px; } }
@media (max-width: 480px) { .gallery figure { width: 62vw; max-width: 230px; } }
.gallery-hint { text-align: center; font-size: 13px; color: var(--ink-3); margin: -12px 0 0; }
@media (min-width: 1160px) { .gallery-hint { display: none; } }

/* ---------- 隐私 ---------- */
.privacy {
  position: relative; overflow: hidden; padding: clamp(28px, 5vw, 56px);
  background:
    radial-gradient(600px 300px at 100% 0%, rgba(255, 182, 200, .35), transparent 70%),
    radial-gradient(600px 360px at 0% 100%, rgba(125, 188, 251, .35), transparent 70%),
    var(--surface);
}
@media (prefers-color-scheme: dark) {
  .privacy { background: radial-gradient(600px 300px at 100% 0%, rgba(255, 182, 200, .12), transparent 70%), radial-gradient(600px 360px at 0% 100%, rgba(125, 188, 251, .14), transparent 70%), var(--surface); }
}
.privacy .h2 { max-width: 15em; }
.privacy .sub { margin-left: 0; }
.promises { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 32px; position: relative; z-index: 1; }
.promise { padding: 18px; border-radius: var(--r); }
.promise svg { width: 26px; height: 26px; color: var(--blue-ink); }
.promise b { display: block; font-size: 16.5px; margin-top: 10px; }
.promise span { display: block; font-size: 14.5px; color: var(--ink-2); margin-top: 4px; line-height: 1.6; }
.privacy .more { display: inline-flex; margin-top: 24px; font-weight: 600; position: relative; z-index: 1; }
.privacy .guard { position: absolute; right: 36px; top: 30px; width: 120px; filter: drop-shadow(0 16px 24px rgba(47, 111, 214, .22)); }
@media (max-width: 980px) { .promises { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .privacy .guard { width: 76px; right: 16px; top: 18px; } .privacy .kicker, .privacy .h2 { padding-right: 70px; } }
@media (max-width: 420px) { .promises { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 问答 ---------- */
.faq { max-width: 780px; margin: 40px auto 0; display: grid; gap: 10px; }
.faq details { border-radius: var(--r); background: var(--surface); border: 1px solid var(--line); transition: box-shadow .3s var(--ease); }
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
  list-style: none; cursor: pointer; padding: 18px 56px 18px 22px; position: relative;
  font-weight: 650; font-size: 16.5px; line-height: 1.5; border-radius: var(--r);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 20px; top: 50%; width: 22px; height: 22px; margin-top: -11px; border-radius: 50%;
  background: var(--tint) no-repeat center/12px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M6 1v10M1 6h10' stroke='%232F6FD6' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E");
  transition: transform .35s var(--ease);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p { margin: 0; padding: 0 22px 20px; color: var(--ink-2); overflow: hidden; }

/* ---------- 加入内测 ---------- */
.join {
  position: relative; overflow: hidden; text-align: center;
  padding: clamp(36px, 6vw, 64px) clamp(20px, 5vw, 56px);
  color: #fff;
  background:
    radial-gradient(500px 260px at 85% 10%, rgba(255, 182, 200, .55), transparent 70%),
    radial-gradient(520px 300px at 10% 100%, rgba(125, 188, 251, .7), transparent 70%),
    linear-gradient(140deg, #2F6FD6, #2559B5);
  border-radius: 36px; box-shadow: var(--shadow-lg);
}
.join .h2, .join h2 { color: #fff; }
.join .sub { color: rgba(255, 255, 255, .88); }
.join .m { width: 110px; margin: 0 auto 8px; filter: drop-shadow(0 16px 24px rgba(0, 0, 0, .2)); }
.join ol { list-style: none; counter-reset: j; padding: 0; margin: 28px auto 0; max-width: 760px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; text-align: left; }
.join ol li {
  counter-increment: j; position: relative; padding: 16px 16px 16px 52px; border-radius: 18px; font-size: 15px; line-height: 1.55;
  background: rgba(255, 255, 255, .14); border: 1px solid rgba(255, 255, 255, .22);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.join ol li::before {
  content: counter(j); position: absolute; left: 14px; top: 15px; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 700; font-size: 13px; background: #fff; color: #2F6FD6;
}
.join .cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 28px; }
.join .btn-primary { background: #fff; color: #1F55B0; box-shadow: 0 10px 30px rgba(0, 0, 0, .18); }
.join .btn-primary:hover { background: #F4F8FE; }
.join .btn-glass { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .35); }
.join .btn-glass:hover { background: rgba(255, 255, 255, .24); }
.join .note { font-size: 14px; color: rgba(255, 255, 255, .82); margin: 18px 0 0; }
.join :focus-visible { outline-color: #fff; }
@media (prefers-color-scheme: dark) {
  .join { background: radial-gradient(500px 260px at 85% 10%, rgba(255, 182, 200, .25), transparent 70%), radial-gradient(520px 300px at 10% 100%, rgba(125, 188, 251, .35), transparent 70%), linear-gradient(140deg, #1E4C9C, #173A78); }
}
@media (max-width: 760px) { .join ol { grid-template-columns: minmax(0, 1fr); } .join .cta .btn { flex: 1 1 100%; } }

/* 气泡 */
.bubbles { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.bubbles i {
  position: absolute; bottom: -40px; left: var(--x); width: var(--s); height: var(--s); border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .9), rgba(125, 188, 251, .25) 60%, rgba(125, 188, 251, .05));
  border: 1px solid rgba(255, 255, 255, .5);
  animation: rise var(--t) linear var(--d) infinite;
}
.join > *:not(.bubbles) { position: relative; z-index: 1; }
@keyframes rise {
  0% { transform: translate(0, 0); opacity: 0; }
  10% { opacity: .9; }
  100% { transform: translate(20px, -110vh); opacity: 0; }
}
.burst { position: fixed; z-index: 90; width: 10px; height: 10px; margin: -5px 0 0 -5px; border-radius: 50%; pointer-events: none; }