.page-contact{
  --pc-line:rgba(169,201,222,.7);
  --pc-line-soft:rgba(169,201,222,.45);
  --pc-radius:14px;
  --pc-shadow:0 22px 48px -34px rgba(6,26,46,.8);
  background:var(--sg-white);
  color:var(--sg-deep);
  font-family:var(--sg-font-sans);
  overflow-x:clip;
}

.page-contact a{ color:inherit; }
.page-contact a:focus-visible,
.page-contact button:focus-visible{
  outline:2px solid var(--sg-coral);
  outline-offset:3px;
  border-radius:6px;
}

.page-contact h2{
  font-family:var(--sg-font-display);
  font-weight:700;
  font-size:clamp(1.5rem,4.4vw,2.125rem);
  line-height:1.24;
  letter-spacing:-.01em;
  margin:0 0 .55em;
  color:var(--sg-deep);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero{
  position:relative;
  padding:28px 0 44px;
  overflow:hidden;
  border-bottom:1px solid var(--pc-line-soft);
  background:
    radial-gradient(120% 100% at 92% -20%, rgba(47,227,176,.26), transparent 55%),
    radial-gradient(100% 90% at 0% 0%, rgba(43,127,184,.18), transparent 58%),
    linear-gradient(180deg, var(--sg-white) 0%, var(--sg-mist) 100%);
}
.page-contact .contact-hero::after{
  content:"";
  position:absolute;
  right:-14%;
  top:-32%;
  width:min(520px,62vw);
  aspect-ratio:1;
  border-radius:50%;
  border:1px solid rgba(43,127,184,.16);
  box-shadow:0 0 0 22px rgba(169,201,222,.14);
  pointer-events:none;
}
.page-contact .contact-hero__inner{
  position:relative;
  z-index:1;
}
.page-contact .contact-crumb{
  position:relative;
  z-index:1;
  margin:0 0 18px;
  font-size:.8125rem;
}
.page-contact .contact-hero h1{
  font-family:var(--sg-font-display);
  font-weight:700;
  font-size:clamp(2rem,7vw,4rem);
  line-height:1.08;
  letter-spacing:-.02em;
  margin:.35em 0 .4em;
  max-width:15em;
}
.page-contact .contact-hero__lead{
  max-width:38em;
  margin:0;
  font-size:1.0625rem;
  line-height:1.75;
  color:var(--sg-tide);
}
.page-contact .contact-hero__jump{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:26px 0 0;
  padding:0;
  list-style:none;
}
.page-contact .contact-hero__jump a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--pc-line);
  background:rgba(247,250,252,.78);
  color:var(--sg-tide);
  font-family:var(--sg-font-mono);
  font-size:.875rem;
  text-decoration:none;
  transition:transform .2s var(--sg-ease), border-color .2s var(--sg-ease), background .2s var(--sg-ease), color .2s var(--sg-ease);
}
.page-contact .contact-hero__jump a:hover{
  transform:translateY(-2px);
  border-color:var(--sg-sea);
  background:var(--sg-white);
  color:var(--sg-deep);
}

/* ---------- 分屏主区 ---------- */
.page-contact .contact-main{
  padding:44px 0 52px;
  background:var(--sg-mist);
}
.page-contact .contact-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
}

.page-contact .contact-form-wrap{
  position:relative;
  min-width:0;
  padding:22px 18px 26px;
  border-radius:var(--sg-radius-l);
  border:1px solid var(--pc-line);
  background:linear-gradient(160deg, rgba(255,255,255,.94), rgba(232,241,247,.82));
  box-shadow:var(--pc-shadow);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.page-contact .contact-form__intro{
  margin:0 0 18px;
  font-size:.9375rem;
  line-height:1.7;
  color:var(--sg-salt);
}

.page-contact .topic-switch{ margin:0; }
.page-contact .topic-pills{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.page-contact .topic-input{
  position:absolute;
  width:1px;
  height:1px;
  margin:-1px;
  padding:0;
  border:0;
  opacity:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
}
.page-contact .topic-pill{
  display:inline-flex;
  align-items:center;
  padding:9px 15px;
  border-radius:999px;
  border:1px solid var(--pc-line);
  background:rgba(247,250,252,.92);
  color:var(--sg-tide);
  font-size:.9375rem;
  line-height:1.2;
  cursor:pointer;
  transition:background .18s var(--sg-ease), border-color .18s var(--sg-ease), color .18s var(--sg-ease), transform .18s var(--sg-ease);
}
.page-contact .topic-pill:hover{
  border-color:var(--sg-sea);
  transform:translateY(-1px);
}
.page-contact .topic-input:checked + .topic-pill{
  background:var(--sg-deep);
  border-color:var(--sg-deep);
  color:var(--sg-white);
  font-weight:600;
  box-shadow:0 10px 20px -14px rgba(6,26,46,.95);
}
.page-contact .topic-input:focus-visible + .topic-pill{
  outline:2px solid var(--sg-coral);
  outline-offset:2px;
}
.page-contact .topic-hints{ margin-top:14px; }
.page-contact .topic-hint{
  display:none;
  margin:0;
  padding:12px 14px;
  border-radius:10px;
  border-left:3px solid var(--sg-sea);
  background:rgba(43,127,184,.1);
  color:var(--sg-tide);
  font-size:.9375rem;
  line-height:1.65;
}
.page-contact .topic-switch:has(#fb-topic-data:checked) .topic-hint--data,
.page-contact .topic-switch:has(#fb-topic-download:checked) .topic-hint--download,
.page-contact .topic-switch:has(#fb-topic-fav:checked) .topic-hint--fav,
.page-contact .topic-switch:has(#fb-topic-partner:checked) .topic-hint--partner,
.page-contact .topic-switch:has(#fb-topic-idea:checked) .topic-hint--idea{
  display:block;
}

.page-contact .contact-fields{
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
  margin-top:22px;
}
.page-contact .field{
  display:grid;
  gap:7px;
  min-width:0;
}
.page-contact .field label{
  font-size:.875rem;
  font-weight:600;
  color:var(--sg-deep);
}
.page-contact .field input[type="text"],
.page-contact .field textarea{
  width:100%;
  box-sizing:border-box;
  padding:11px 13px;
  border-radius:10px;
  border:1px solid var(--pc-line);
  background:rgba(255,255,255,.96);
  color:var(--sg-deep);
  font-family:var(--sg-font-sans);
  font-size:.9375rem;
  line-height:1.55;
  transition:border-color .18s var(--sg-ease), box-shadow .18s var(--sg-ease);
}
.page-contact .field textarea{
  min-height:132px;
  resize:vertical;
}
.page-contact .field input[type="text"]:focus,
.page-contact .field textarea:focus{
  outline:none;
  border-color:var(--sg-coral);
  box-shadow:0 0 0 3px rgba(217,79,50,.16);
}
.page-contact .field input::placeholder,
.page-contact .field textarea::placeholder{
  color:rgba(94,113,131,.75);
}
.page-contact .field__hint{
  margin:0;
  font-size:.8125rem;
  line-height:1.6;
  color:var(--sg-salt);
}

.page-contact .consent{
  display:flex;
  align-items:flex-start;
  gap:10px;
  margin-top:18px;
  font-size:.9375rem;
  line-height:1.6;
  color:var(--sg-tide);
  cursor:pointer;
}
.page-contact .consent input{
  flex:0 0 auto;
  width:18px;
  height:18px;
  margin:3px 0 0;
  accent-color:var(--sg-coral);
}
.page-contact .consent a{
  color:var(--sg-sea);
  text-decoration:underline;
  text-underline-offset:2px;
}

.page-contact .contact-submit{
  display:grid;
  gap:12px;
  margin-top:20px;
}
.page-contact .contact-submit__btn{
  justify-self:start;
  font-family:var(--sg-font-sans);
}
.page-contact .contact-submit__alt{
  margin:0;
  font-size:.875rem;
  line-height:1.65;
  color:var(--sg-salt);
}
.page-contact .contact-submit__alt strong{
  font-family:var(--sg-font-mono);
  font-weight:600;
  color:var(--sg-tide);
  word-break:break-all;
}

/* ---------- 侧栏联系卡 ---------- */
.page-contact .contact-side{
  display:grid;
  gap:18px;
  min-width:0;
}
.page-contact .contact-quick{
  position:relative;
  overflow:hidden;
  padding:24px 20px 22px;
  border-radius:var(--sg-radius-l);
  background:linear-gradient(165deg, var(--sg-tide) 0%, var(--sg-deep) 52%, var(--sg-night) 100%);
  color:var(--sg-white);
  box-shadow:0 26px 52px -34px rgba(6,26,46,.95);
}
.page-contact .contact-quick::after{
  content:"";
  position:absolute;
  left:-30%;
  right:-30%;
  bottom:-52%;
  height:200px;
  border-radius:50%;
  background:radial-gradient(closest-side, rgba(47,227,176,.3), transparent);
  pointer-events:none;
}
.page-contact .contact-quick > *{
  position:relative;
  z-index:1;
}
.page-contact .contact-quick__label{
  margin:0 0 10px;
  font-family:var(--sg-font-mono);
  font-size:.75rem;
  letter-spacing:.14em;
  color:var(--sg-lime);
}
.page-contact .contact-quick h2{
  margin:0 0 .45em;
  font-size:clamp(1.35rem,4vw,1.7rem);
  color:var(--sg-white);
}
.page-contact .contact-quick__lead{
  margin:0;
  font-size:.9375rem;
  line-height:1.65;
  color:rgba(232,241,247,.82);
}
.page-contact .contact-quick dl{
  display:grid;
  gap:14px;
  margin:20px 0 0;
}
.page-contact .contact-quick__row{
  padding-bottom:12px;
  border-bottom:1px solid rgba(169,201,222,.22);
}
.page-contact .contact-quick__row:last-child{
  padding-bottom:0;
  border-bottom:0;
}
.page-contact .contact-quick dt{
  font-family:var(--sg-font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  color:var(--sg-lime);
}
.page-contact .contact-quick dd{
  margin:5px 0 0;
  font-family:var(--sg-font-mono);
  font-size:.9375rem;
  line-height:1.5;
  color:var(--sg-white);
  word-break:break-all;
}
.page-contact .contact-quick__link{
  display:inline-flex;
  align-items:center;
  margin-top:20px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid rgba(247,250,252,.45);
  color:var(--sg-white);
  font-size:.875rem;
  text-decoration:none;
  transition:border-color .2s var(--sg-ease), background .2s var(--sg-ease);
}
.page-contact .contact-quick__link:hover{
  border-color:var(--sg-lime);
  background:rgba(47,227,176,.14);
}

/* ---------- 联系方式 ---------- */
.page-contact .contact-channels{
  padding:48px 0 52px;
  background:var(--sg-white);
}
.page-contact .channels-head{
  max-width:44em;
  margin-bottom:26px;
}
.page-contact .channels-lead{
  margin:0;
  font-size:.9375rem;
  line-height:1.75;
  color:var(--sg-salt);
}
.page-contact .channels-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
}
.page-contact .channels-media{
  margin:0;
  overflow:hidden;
  border-radius:var(--sg-radius-l);
  background:linear-gradient(150deg, var(--sg-mist), var(--sg-glass));
  border:1px solid var(--pc-line-soft);
}
.page-contact .channels-media img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  aspect-ratio:3 / 2;
  object-fit:cover;
}
.page-contact .channel-list{
  display:grid;
  gap:14px;
  margin:0;
  padding:0;
  list-style:none;
}
.page-contact .channel-item{
  display:grid;
  gap:6px;
  padding:16px 18px;
  border-radius:var(--pc-radius);
  border:1px solid var(--pc-line-soft);
  border-left:3px solid var(--sg-sea);
  background:var(--sg-white);
  transition:transform .2s var(--sg-ease), border-color .2s var(--sg-ease), box-shadow .2s var(--sg-ease);
}
.page-contact .channel-item:hover{
  transform:translateY(-2px);
  border-color:var(--sg-glass);
  border-left-color:var(--sg-coral);
  box-shadow:0 18px 34px -30px rgba(6,26,46,.9);
}
.page-contact .channel-item__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px;
}
.page-contact .channel-item__name{
  font-weight:700;
  font-size:1rem;
  color:var(--sg-deep);
}
.page-contact .channel-item__value{
  margin:0;
  font-family:var(--sg-font-mono);
  font-size:.9375rem;
  line-height:1.6;
  color:var(--sg-tide);
  word-break:break-all;
}
.page-contact .channel-item__note{
  margin:0;
  font-size:.875rem;
  line-height:1.65;
  color:var(--sg-salt);
}

/* ---------- 处理流程 ---------- */
.page-contact .contact-process{
  position:relative;
  overflow:hidden;
  padding:48px 0 52px;
  background:
    radial-gradient(90% 80% at 100% 0%, rgba(47,227,176,.16), transparent 58%),
    linear-gradient(170deg, var(--sg-tide) 0%, var(--sg-deep) 60%, var(--sg-night) 100%);
  color:var(--sg-white);
}
.page-contact .contact-process h2{
  color:var(--sg-white);
}
.page-contact .contact-process .sg-eyebrow{
  color:var(--sg-lime);
}
.page-contact .process-head{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
}
.page-contact .process-lead{
  max-width:34em;
  margin:0;
  font-size:.9375rem;
  line-height:1.75;
  color:rgba(232,241,247,.8);
}
.page-contact .process-figure{
  margin:0;
  overflow:hidden;
  border-radius:var(--sg-radius-l);
  border:1px solid rgba(169,201,222,.32);
}
.page-contact .process-figure img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  aspect-ratio:4 / 3;
  object-fit:cover;
}
.page-contact .process-track{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  margin:30px 0 0;
  padding:0;
  list-style:none;
}
.page-contact .process-step{
  position:relative;
  padding:20px 16px 18px;
  border-radius:var(--pc-radius);
  border:1px solid rgba(169,201,222,.26);
  background:rgba(6,26,46,.35);
}
.page-contact .process-step::before{
  content:"";
  position:absolute;
  left:16px;
  top:0;
  width:44px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg, var(--sg-lime), rgba(47,227,176,0));
}
.page-contact .process-step__num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;
  height:32px;
  border-radius:50%;
  border:1px solid rgba(47,227,176,.55);
  background:rgba(6,26,46,.9);
  color:var(--sg-lime);
  font-family:var(--sg-font-mono);
  font-size:.8125rem;
}
.page-contact .process-step h3{
  margin:12px 0 6px;
  font-family:var(--sg-font-display);
  font-size:1.0625rem;
  font-weight:700;
  color:var(--sg-white);
}
.page-contact .process-step p{
  margin:0;
  font-size:.875rem;
  line-height:1.65;
  color:rgba(232,241,247,.78);
}

/* ---------- 提交清单 ---------- */
.page-contact .contact-checklist{
  padding:48px 0 52px;
  background:var(--sg-white);
}
.page-contact .checklist-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
}
.page-contact .checklist-intro p{
  margin:0 0 16px;
  font-size:.9375rem;
  line-height:1.75;
  color:var(--sg-salt);
}
.page-contact .checklist-link{
  display:inline-flex;
  align-items:center;
  padding:10px 18px;
  border-radius:999px;
  border:1px solid var(--sg-sea);
  color:var(--sg-sea);
  font-size:.9375rem;
  text-decoration:none;
  transition:background .2s var(--sg-ease), color .2s var(--sg-ease);
}
.page-contact .checklist-link:hover{
  background:var(--sg-sea);
  color:var(--sg-white);
}
.page-contact .checklist-items{
  display:grid;
  gap:0;
  margin:0;
  padding:0;
  list-style:none;
}
.page-contact .checklist-item{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:14px;
  padding:16px 0;
  border-bottom:1px dashed var(--pc-line);
}
.page-contact .checklist-item:first-child{ padding-top:0; }
.page-contact .checklist-item:last-child{
  padding-bottom:0;
  border-bottom:0;
}
.page-contact .checklist-item__idx{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:8px;
  background:var(--sg-mist);
  border:1px solid var(--pc-line);
  color:var(--sg-tide);
  font-family:var(--sg-font-mono);
  font-size:.8125rem;
}
.page-contact .checklist-item h3{
  margin:2px 0 5px;
  font-family:var(--sg-font-sans);
  font-size:1rem;
  font-weight:700;
  color:var(--sg-deep);
}
.page-contact .checklist-item p{
  margin:0;
  font-size:.9rem;
  line-height:1.68;
  color:var(--sg-salt);
}

/* ---------- 下一步 ---------- */
.page-contact .contact-next{
  padding:44px 0 50px;
  background:var(--sg-night);
  color:var(--sg-white);
}
.page-contact .contact-next h2{
  color:var(--sg-white);
  max-width:26em;
}
.page-contact .contact-next .sg-eyebrow{
  color:var(--sg-lime);
}
.page-contact .next-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  margin-top:24px;
}
.page-contact .next-card{
  display:block;
  padding:18px 16px;
  border-radius:var(--pc-radius);
  border:1px solid rgba(169,201,222,.28);
  background:rgba(247,250,252,.06);
  text-decoration:none;
  transition:transform .2s var(--sg-ease), border-color .2s var(--sg-ease), background .2s var(--sg-ease);
}
.page-contact .next-card:hover{
  transform:translateY(-3px);
  border-color:var(--sg-lime);
  background:rgba(47,227,176,.12);
}
.page-contact .next-card__title{
  margin:0 0 6px;
  font-family:var(--sg-font-sans);
  font-size:1rem;
  font-weight:700;
  color:var(--sg-white);
}
.page-contact .next-card__desc{
  margin:0;
  font-size:.875rem;
  line-height:1.65;
  color:rgba(232,241,247,.76);
}

/* ---------- 响应式 ---------- */
@media (min-width:720px){
  .page-contact .contact-fields{
    grid-template-columns:1fr 1fr;
  }
  .page-contact .field--wide{
    grid-column:1 / -1;
  }
  .page-contact .next-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-contact .process-track{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (min-width:900px){
  .page-contact .contact-hero{
    padding:38px 0 56px;
  }
  .page-contact .contact-main{
    padding:56px 0 64px;
  }
  .page-contact .contact-layout{
    grid-template-columns:minmax(0,1.42fr) minmax(0,.86fr);
    gap:32px;
    align-items:start;
  }
  .page-contact .contact-form-wrap{
    padding:28px 28px 32px;
  }
  .page-contact .contact-channels,
  .page-contact .contact-checklist{
    padding:64px 0 68px;
  }
  .page-contact .contact-process{
    padding:64px 0 68px;
  }
  .page-contact .channels-grid{
    grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);
    gap:34px;
    align-items:start;
  }
  .page-contact .process-head{
    grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
    gap:36px;
  }
  .page-contact .checklist-grid{
    grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);
    gap:44px;
    align-items:start;
  }
}

@media (min-width:1080px){
  .page-contact .process-track{
    grid-template-columns:repeat(5,minmax(0,1fr));
  }
  .page-contact .next-grid{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-contact .contact-next{
    padding:52px 0 58px;
  }
}