/* 火火暖号 start / chooser page */

.start-page { background: var(--bg); }
.start-header { position: relative; }
.start-header .desktop-nav { gap: 28px; }
.start-header .header-actions { gap: 9px; }

.start-main { overflow: hidden; }
.start-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(55px, 7vw, 90px) 0 clamp(55px, 7vw, 95px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(760px 420px at 76% 43%, rgba(255, 75, 62, .1), transparent 65%),
    radial-gradient(500px 320px at 12% 75%, rgba(232, 195, 122, .035), transparent 70%),
    var(--bg);
}
.start-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .022) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, black, transparent 88%);
  pointer-events: none;
}
.start-glow {
  position: absolute;
  right: 8%;
  top: 24%;
  width: 440px;
  height: 440px;
  border: 1px solid rgba(255, 75, 62, .08);
  border-radius: 50%;
  box-shadow: 0 0 0 48px rgba(255, 75, 62, .018), 0 0 0 96px rgba(255, 75, 62, .012);
  pointer-events: none;
}
.start-container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(560px, 1.1fr);
  align-items: center;
  gap: clamp(36px, 5vw, 78px);
}
.start-eyebrow { margin-bottom: clamp(30px, 4.6vh, 48px); }
.start-copy h1 {
  margin: 0;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: clamp(52px, 5.8vw, 86px);
  font-weight: 800;
  letter-spacing: -.085em;
  line-height: 1.02;
}
.start-copy h1 .accent-word { color: var(--accent); }
.start-copy > p {
  max-width: 460px;
  margin-top: 25px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.95;
}
.start-stats {
  display: flex;
  gap: 30px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.start-stats > div { display: flex; flex-direction: column; gap: 2px; }
.start-stats strong {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1;
}
.start-stats sup { color: var(--accent); font-size: 11px; vertical-align: super; }
.start-stats span { color: var(--dim); font-size: 9px; letter-spacing: .06em; }

.start-choices { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; gap: 13px; }
.start-card {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 510px;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, rgba(255, 255, 255, .055), transparent 36%),
    #09090a;
  transition: border-color .3s, transform .4s var(--ease), background .3s;
}
.start-card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.start-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 52%;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.start-card.start-owner::before { background: linear-gradient(90deg, var(--yellow), transparent); }
.start-card-index {
  position: absolute;
  z-index: 3;
  top: 17px; left: 17px;
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: .12em;
}
.start-card-art {
  position: relative;
  aspect-ratio: 1 / 1;
  height: auto;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(220px 160px at 50% 45%, rgba(255, 75, 62, .13), transparent 70%),
    #0c0c0e;
}
.start-owner .start-card-art {
  background:
    radial-gradient(250px 160px at 50% 45%, rgba(232, 195, 122, .12), transparent 70%),
    #0c0c0e;
}
.start-card-art::after { display: none; }
.start-card-art picture { display: block; width: 100%; height: 100%; }
.start-card-art img { object-position: center center; }
.start-card-art img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 1;
  filter: none;
  transition: transform .7s var(--ease);
}
.start-owner .start-card-art img {
  width: 100%;
  max-width: none;
  height: 100%;
  margin: 0;
  object-fit: cover;
  opacity: 1;
  filter: none;
  transform: none;
}
.start-card:hover .start-card-art img { transform: scale(1.025); }
.start-owner:hover .start-card-art img { transform: scale(1.025); }
.start-card-body {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 17px 18px 18px;
}
.start-card-kicker {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 7px;
  letter-spacing: .18em;
}
.start-owner .start-card-kicker { color: var(--yellow); }
.start-card h2 {
  margin-top: 8px;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -.065em;
  line-height: 1;
}
.start-card p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.8;
}
.start-card-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
  padding-top: 15px;
  color: var(--text-soft);
  border-top: 1px solid var(--line);
  font-size: 10px;
}
.start-card-link i {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 25px; height: 25px;
  color: #080808;
  background: var(--accent);
  font-style: normal;
  transition: transform .25s;
}
.start-owner .start-card-link i { background: var(--yellow); }
.start-card:hover .start-card-link i { transform: translateX(3px); }

.start-flow { padding: clamp(55px, 7vw, 90px) 0; background: #060606; }
.start-flow-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 30px; }
.start-flow-head h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -.06em;
  line-height: 1.1;
}
.start-flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.start-flow-grid article { padding: 21px 20px 23px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.start-flow-grid article > span { color: var(--accent); font-family: var(--font-mono); font-size: 7px; letter-spacing: .12em; }
.start-flow-grid h3 { margin-top: 12px; font-size: 20px; letter-spacing: -.04em; }
.start-flow-grid p { margin-top: 8px; color: var(--dim); font-size: 10px; line-height: 1.85; }
.start-flow-grid a { display: inline-block; margin-top: 16px; color: var(--muted); font-size: 9px; border-bottom: 1px solid var(--line-strong); padding-bottom: 2px; }
.start-flow-grid a:hover { color: var(--text); }

.start-support { padding: 26px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg); }
.start-support-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.start-support-inner > div:first-child { display: flex; align-items: baseline; gap: 14px; }
.start-support-inner span { color: var(--dim); font-family: var(--font-display); font-size: 7px; letter-spacing: .16em; }
.start-support-inner strong { font-size: 17px; letter-spacing: -.03em; }
.start-support-inner a { color: var(--muted); font-size: 9px; }
.start-support-inner > div:first-child a { color: var(--accent); font-family: var(--font-mono); font-size: 9px; }
.start-support-links { display: flex; gap: 18px; }
.start-support-links a:hover { color: var(--text); }

.start-footer { padding: 20px 0; }
.start-footer-inner { display: flex; justify-content: space-between; gap: 20px; color: #4b4944; font-size: 8px; line-height: 1.7; }
.start-footer-inner span:last-child { max-width: 560px; text-align: right; }

/* Responsive */
@media (max-width: 1240px) {
  .start-container { grid-template-columns: minmax(0, .86fr) minmax(520px, 1.14fr); gap: 40px; }
  .start-copy h1 { font-size: clamp(52px, 6.1vw, 76px); }
  .start-card { min-height: 550px; }
  .start-card h2 { font-size: 32px; }
}
@media (max-width: 1080px) {
  .start-header .header-actions .btn-ghost { display: none; }
  .start-container { grid-template-columns: 1fr; gap: 42px; }
  .start-copy > p { max-width: 520px; }
  .start-stats { max-width: 460px; }
  .start-choices { max-width: 700px; }
  .start-card { min-height: 520px; }
}
@media (max-width: 900px) {
  .start-header .header-actions .btn-small { display: inline-flex; }
  .start-copy h1 { font-size: clamp(48px, 9vw, 68px); }
  .start-flow-head { flex-direction: column; align-items: flex-start; gap: 14px; }
  .start-flow-grid { grid-template-columns: 1fr; }
  .start-support-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
}
@media (max-width: 640px) {
  .start-header .header-actions .btn-ghost { display: none; }
  .start-header .brand-copy em { display: none; }
  .start-hero { padding: 38px 0 55px; }
  .start-glow { display: none; }
  .start-eyebrow { margin-bottom: 25px; }
  .start-copy h1 { font-size: clamp(43px, 13vw, 58px); }
  .start-copy > p { margin-top: 19px; font-size: 12px; }
  .start-stats { margin-top: 28px; padding-top: 16px; gap: 20px; }
  .start-choices { grid-template-columns: 1fr; }
  .start-card { min-height: 440px; }
  .start-card-art { height: auto; aspect-ratio: 1 / 1; }
  .start-card h2 { font-size: 30px; }
  .start-flow { padding: 45px 0; }
  .start-flow-grid h3 { font-size: 18px; }
  .start-support-inner > div:first-child { flex-wrap: wrap; }
  .start-support-links { flex-wrap: wrap; gap: 12px; }
  .start-footer-inner { flex-direction: column; }
  .start-footer-inner span:last-child { text-align: left; }
}