/* ==========================================================
   联系通道 /contact/ 页面专属样式
   作用域：.page-contact
   ========================================================== */

.page-contact {
  --contact-gap: clamp(1.25rem, 3.5vw, 2rem);
  --contact-pad: clamp(1.1rem, 3vw, 1.6rem);
  --contact-hair: rgba(27, 36, 80, .72);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-top: clamp(1.75rem, 5vw, 3.25rem);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(27, 36, 80, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 36, 80, .55) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 78% at 72% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 78% at 72% 0%, #000 0%, transparent 74%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact h1 {
  margin: .65rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 6.4vw, 3.35rem);
  font-weight: 900;
  line-height: 1.09;
  letter-spacing: -.022em;
  color: var(--c-ink);
}

.page-contact .contact-hero__intro {
  margin: 1.05rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 三个通道 ---------- */
.page-contact .channel-list {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.35rem) 0 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-contact .channel {
  position: relative;
  padding: var(--contact-pad);
  background: linear-gradient(140deg, rgba(21, 29, 69, .94) 0%, rgba(14, 20, 48, .74) 62%, rgba(6, 10, 28, .7) 100%);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  opacity: .9;
  background: var(--c-cyan);
}

.page-contact .channel--mail::before { background: var(--c-warn); }
.page-contact .channel--line::before { background: var(--c-cyan); }
.page-contact .channel--addr::before { background: var(--c-violet); }

.page-contact .channel__key {
  display: block;
  font-size: .68rem;
  letter-spacing: .13em;
  color: var(--c-muted);
}

.page-contact .channel__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  width: 100%;
  margin: .45rem 0 0;
  padding: 0;
  border: 0;
  background: none;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.7vw, 1.34rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.012em;
  color: var(--c-glow);
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease), text-shadow var(--dur) var(--ease);
}

.page-contact .channel__value > span:first-child {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-contact .channel__value .copy-hint {
  flex: 0 0 auto;
  padding: .15rem .55rem;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--c-muted);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .channel__use {
  margin: .6rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 首屏右侧视觉 ---------- */
.page-contact .contact-hero__visual {
  position: relative;
}

.page-contact .contact-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

.page-contact .contact-hero__caption {
  margin: .8rem 0 0;
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--c-muted);
  text-align: right;
}

/* ---------- 反馈要点 ---------- */
.page-contact .brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-contact .brief-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .brief {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: .3rem .85rem;
  padding: 1rem 0;
  border-top: 1px solid var(--contact-hair);
}

.page-contact .brief:last-child {
  border-bottom: 1px solid var(--contact-hair);
}

.page-contact .brief__idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: .2rem;
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--c-cyan);
}

.page-contact .brief__title {
  grid-column: 2;
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.005em;
  color: var(--c-ink);
}

.page-contact .brief p {
  grid-column: 2;
  margin: .3rem 0 0;
  font-size: .91rem;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact .brief-side {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-contact .brief-template {
  padding: var(--contact-pad);
  background: linear-gradient(150deg, rgba(21, 29, 69, .95), rgba(14, 20, 48, .68));
}

.page-contact .brief-template__body {
  margin: .7rem 0 1.1rem;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.9;
  color: var(--c-glow);
  overflow-wrap: anywhere;
}

.page-contact .brief-template__copy {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .5rem .95rem;
  border: 1px solid rgba(41, 240, 222, .4);
  border-radius: 999px;
  background: rgba(41, 240, 222, .07);
  color: var(--c-cyan);
  font-family: var(--font-sans);
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .brief-template__copy .copy-hint {
  font-size: .68rem;
  letter-spacing: .06em;
  color: rgba(41, 240, 222, .68);
}

.page-contact .brief-side__tip {
  margin: 0;
  padding: .9rem 1rem;
  border-left: 2px solid var(--c-violet);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(138, 92, 255, .07);
  font-size: .88rem;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact a {
  color: var(--c-cyan);
  text-decoration-color: rgba(41, 240, 222, .38);
  text-underline-offset: 3px;
}

/* ---------- 处理流程 ---------- */
.page-contact .flow-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-contact .flow-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr);
  gap: 1rem;
  padding-bottom: 1.5rem;
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 1.4rem;
  top: 3rem;
  bottom: .35rem;
  width: 1px;
  background: linear-gradient(180deg, var(--c-line), rgba(27, 36, 80, .18));
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__num {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border: 1px solid rgba(41, 240, 222, .3);
  border-radius: var(--r-md);
  background: var(--c-panel);
  font-size: .8rem;
  letter-spacing: .05em;
  color: var(--c-cyan);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .flow__title {
  margin: .78rem 0 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ink);
  transition: color var(--dur) var(--ease);
}

.page-contact .flow__step p {
  margin: .35rem 0 0;
  font-size: .9rem;
  line-height: 1.74;
  color: var(--c-muted);
}

/* ---------- 合作对接 ---------- */
.page-contact .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-contact .partner {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  padding: var(--contact-pad);
  background: linear-gradient(160deg, rgba(21, 29, 69, .9), rgba(14, 20, 48, .64));
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .partner h3 {
  margin: .2rem 0 0;
  font-size: 1.06rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-contact .partner p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.74;
  color: var(--c-muted);
}

.page-contact .partner__list {
  list-style: none;
  margin: auto 0 0;
  padding: .95rem 0 0;
  border-top: 1px solid var(--contact-hair);
  display: grid;
  gap: .42rem;
  font-size: .84rem;
  color: var(--c-muted);
}

.page-contact .partner__list li {
  position: relative;
  padding-left: 1rem;
}

.page-contact .partner__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px rgba(41, 240, 222, .7);
}

.page-contact .partner-note {
  margin: clamp(2.5rem, 7vw, 4.5rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--c-cyan);
  font-size: .9rem;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-contact .partner-note strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--c-glow);
  overflow-wrap: anywhere;
}

/* ---------- 服务时效 ---------- */
.page-contact .stat-strip {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-contact .timeliness-note {
  margin: clamp(1.5rem, 4vw, 2rem) 0 0;
  max-width: 68ch;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 延伸入口 ---------- */
.page-contact .next-links {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: clamp(1.25rem, 3.5vw, 2rem);
  background: linear-gradient(155deg, rgba(21, 29, 69, .86), rgba(14, 20, 48, .6));
}

.page-contact .next-links__title {
  margin: 0 0 1.1rem;
  font-size: 1.04rem;
  font-weight: 800;
  color: var(--c-ink);
}

.page-contact .next-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
}

.page-contact .next-link {
  display: block;
  padding: .9rem 1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: rgba(6, 10, 28, .52);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .next-link .mono {
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--c-cyan);
}

.page-contact .next-link p {
  margin: .4rem 0 0;
  font-size: .86rem;
  line-height: 1.66;
  color: var(--c-muted);
}

/* ---------- 悬停增强（仅指针设备） ---------- */
@media (hover: hover) {
  .page-contact .channel:hover {
    border-color: rgba(41, 240, 222, .32);
    transform: translateX(3px);
  }
  .page-contact .channel--mail:hover {
    border-color: rgba(255, 138, 60, .42);
  }
  .page-contact .channel--addr:hover {
    border-color: rgba(138, 92, 255, .44);
  }
  .page-contact .channel__value:hover {
    color: #fff;
    text-shadow: 0 0 18px rgba(185, 251, 255, .55);
  }
  .page-contact .channel__value:hover .copy-hint {
    color: var(--c-cyan);
    border-color: rgba(41, 240, 222, .5);
  }
  .page-contact .brief-template__copy:hover {
    background: rgba(41, 240, 222, .15);
    border-color: rgba(41, 240, 222, .72);
  }
  .page-contact .flow__step:hover .flow__num {
    border-color: var(--c-cyan);
    box-shadow: var(--glow-cyan);
  }
  .page-contact .flow__step:hover .flow__title {
    color: var(--c-cyan);
  }
  .page-contact .partner:hover {
    border-color: rgba(41, 240, 222, .34);
  }
  .page-contact .next-link:hover {
    border-color: rgba(41, 240, 222, .46);
    transform: translateY(-2px);
  }
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 720px) {
  .page-contact .next-links__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .brief-grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, .76fr);
    align-items: start;
  }
  .page-contact .flow-grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-contact .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .partner:nth-child(2) {
    transform: translateY(1.75rem);
  }
}

@media (min-width: 980px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }
  .page-contact .contact-hero__visual {
    margin-top: 1.5rem;
  }
  .page-contact .contact-hero__visual::before {
    content: "";
    position: absolute;
    inset: 16px -16px -16px 16px;
    border: 1px solid rgba(138, 92, 255, .3);
    border-radius: var(--r-lg);
    pointer-events: none;
  }
}

/* ---------- 低配与减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .flow__num,
  .page-contact .next-link {
    transition: none;
  }
  .page-contact .channel:hover,
  .page-contact .next-link:hover {
    transform: none;
  }
}