/* ===========================================================
   用户协议 / 页面专属样式
   scope: .page-disclaimer
   =========================================================== */

.page-disclaimer {
  --rule-no-w: 42px;
  --rule-head-gap: clamp(8px, 1.6vw, 16px);
  background: var(--c-field);
  color: var(--c-paper);
}

.page-disclaimer a {
  color: var(--c-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 195, .38);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-disclaimer a:hover {
  border-bottom-color: var(--c-teal);
}

/* ---------- 面包屑 ---------- */

.page-disclaimer .crumbs-wrap {
  padding-block: clamp(18px, 2.6vw, 30px) 0;
}

/* ---------- 页首 ---------- */

.page-disclaimer .rule-hero {
  position: relative;
  padding-block: clamp(32px, 5.5vw, 68px) clamp(20px, 3vw, 34px);
  overflow: hidden;
}

.page-disclaimer .rule-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(120% 92% at 80% 26%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 92% at 80% 26%, #000 0%, transparent 68%);
}

.page-disclaimer .rule-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-disclaimer .rule-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: var(--fs-note);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-disclaimer .rule-hero__eyebrow-no {
  font-family: var(--font-num);
  color: var(--c-teal);
  letter-spacing: .08em;
}

.page-disclaimer .rule-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(36px, 7vw, 68px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.5px;
  color: var(--c-white);
}

.page-disclaimer .rule-hero__lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-paper);
  opacity: .86;
}

.page-disclaimer .rule-hero__aside {
  display: none;
}

.page-disclaimer .rule-hero__track {
  display: block;
  width: 100%;
  height: 34px;
  margin-top: clamp(24px, 3.6vw, 44px);
}

.page-disclaimer .rule-hero__track-main {
  stroke: var(--c-teal);
  stroke-width: 1;
  opacity: .5;
}

.page-disclaimer .rule-hero__track-ghost {
  stroke: var(--c-orange);
  stroke-width: 1;
  opacity: .28;
}

/* ---------- 首图 ---------- */

.page-disclaimer .rule-figure {
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--grid-line);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-disclaimer .rule-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 规则索引带 ---------- */

.page-disclaimer .rule-index {
  margin-top: clamp(36px, 5.5vw, 68px);
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
  background: var(--c-field-deep);
}

.page-disclaimer .rule-index__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid-line);
}

.page-disclaimer .rule-index__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px clamp(12px, 2vw, 20px);
  background: var(--c-field-deep);
  color: var(--c-paper);
  border: 0;
  transition: background-color var(--dur) var(--ease);
}

.page-disclaimer .rule-index__item:hover {
  background: rgba(0, 229, 195, .08);
  border-bottom-color: transparent;
}

.page-disclaimer .rule-index__no {
  font-family: var(--font-num);
  font-size: var(--fs-note);
  letter-spacing: .1em;
  color: var(--c-teal);
  flex: 0 0 auto;
}

.page-disclaimer .rule-index__name {
  font-size: var(--fs-sm);
  line-height: 1.4;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

.page-disclaimer .rule-index__item:hover .rule-index__name {
  color: var(--c-teal);
}

/* ---------- 正文主体 ---------- */

.page-disclaimer .rule-body {
  padding-block: clamp(44px, 7vw, 88px) clamp(56px, 9vw, 112px);
}

.page-disclaimer .rule-section {
  padding-block: clamp(34px, 5.5vw, 62px);
  border-top: 1px solid var(--grid-line);
}

.page-disclaimer .rule-body > .rule-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-disclaimer .rule-section__head {
  display: grid;
  grid-template-columns: var(--rule-no-w) minmax(0, 1fr);
  gap: var(--rule-head-gap);
  align-items: baseline;
}

.page-disclaimer .rule-section__no {
  font-family: var(--font-num);
  font-size: var(--fs-note);
  letter-spacing: .18em;
  color: var(--c-orange);
}

.page-disclaimer .rule-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.3px;
  color: var(--c-white);
}

.page-disclaimer .rule-section__lead {
  margin: clamp(12px, 1.8vw, 18px) 0 clamp(18px, 2.6vw, 28px);
  max-width: 34em;
  font-size: var(--fs-sm);
  line-height: var(--lh-body);
  color: var(--c-mute);
}

/* ---------- 规则条目 ---------- */

.page-disclaimer .rule-list {
  display: block;
}

.page-disclaimer .rule-item {
  border-top: 1px solid var(--grid-line);
}

.page-disclaimer .rule-item:last-of-type {
  border-bottom: 1px solid var(--grid-line);
}

.page-disclaimer .rule-item__head {
  display: grid;
  grid-template-columns: var(--rule-no-w) minmax(0, 1fr) 20px;
  gap: var(--rule-head-gap);
  align-items: center;
  padding-block: clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
}

.page-disclaimer .rule-item__head::-webkit-details-marker {
  display: none;
}

.page-disclaimer .rule-item__head::marker {
  content: "";
}

.page-disclaimer .rule-item__head:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 3px;
}

.page-disclaimer .rule-item__no {
  font-family: var(--font-num);
  font-size: var(--fs-note);
  letter-spacing: .1em;
  color: var(--c-mute);
  transition: color var(--dur) var(--ease);
}

.page-disclaimer .rule-item[open] .rule-item__no {
  color: var(--c-teal);
}

.page-disclaimer .rule-item__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

.page-disclaimer .rule-item__head:hover .rule-item__title {
  color: var(--c-teal);
}

.page-disclaimer .rule-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
  color: var(--c-mute);
}

.page-disclaimer .rule-item__mark::before,
.page-disclaimer .rule-item__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-disclaimer .rule-item__mark::before {
  width: 12px;
  height: 1px;
}

.page-disclaimer .rule-item__mark::after {
  width: 1px;
  height: 12px;
}

.page-disclaimer .rule-item[open] .rule-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-disclaimer .rule-item__body {
  padding-block: 0 clamp(18px, 2.6vw, 26px);
}

.page-disclaimer .rule-item__body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-paper);
  opacity: .82;
}

.page-disclaimer .rule-item__body p + p {
  margin-top: .85em;
}

/* ---------- 联系区 ---------- */

.page-disclaimer .rule-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-disclaimer .contact-card {
  position: relative;
  background: var(--c-field-deep);
  border: 1px solid var(--c-line);
  padding: clamp(20px, 2.8vw, 30px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-disclaimer .contact-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 15px;
  height: 15px;
  background: linear-gradient(225deg, var(--c-field) 50%, transparent 50%);
  pointer-events: none;
}

.page-disclaimer .contact-card:hover,
.page-disclaimer .contact-card:focus-within {
  border-color: var(--c-teal);
  transform: translateY(-2px);
}

.page-disclaimer .contact-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-disclaimer .contact-row {
  display: grid;
  grid-template-columns: minmax(0, 78px) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-disclaimer .contact-row__k {
  font-size: var(--fs-note);
  letter-spacing: .08em;
  color: var(--c-mute);
}

.page-disclaimer .contact-row__v {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

.page-disclaimer .contact-row__v--mono {
  font-family: var(--font-num);
  letter-spacing: .02em;
  color: var(--c-white);
}

.page-disclaimer .contact-card__note {
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--c-mute);
}

.page-disclaimer .rule-list--tight .rule-item:first-child {
  border-top: 1px solid var(--grid-line);
}

/* ---------- 小屏适配 ---------- */

@media (max-width: 479px) {
  .page-disclaimer .rule-index__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-disclaimer .rule-item__head {
    grid-template-columns: 34px minmax(0, 1fr) 16px;
  }

  .page-disclaimer .contact-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 5px;
  }
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-disclaimer {
    --rule-no-w: 48px;
  }

  .page-disclaimer .rule-item__body {
    padding-inline-start: calc(var(--rule-no-w) + var(--rule-head-gap));
  }

  .page-disclaimer .rule-section__lead {
    margin-inline-start: calc(var(--rule-no-w) + var(--rule-head-gap));
  }
}

@media (min-width: 760px) {
  .page-disclaimer .rule-index__inner {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-disclaimer {
    --rule-no-w: 54px;
  }

  .page-disclaimer .rule-hero__grid {
    grid-template-columns: minmax(0, 1fr) 118px;
    align-items: end;
  }

  .page-disclaimer .rule-hero__aside {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    align-self: stretch;
    padding-left: 16px;
    border-left: 1px solid var(--grid-line);
  }

  .page-disclaimer .rule-hero__vnote {
    writing-mode: vertical-rl;
    font-family: var(--font-num);
    font-size: var(--fs-note);
    letter-spacing: .34em;
    color: var(--c-mute);
  }

  .page-disclaimer .rule-contact__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .contact-card,
  .page-disclaimer .rule-index__item,
  .page-disclaimer .rule-item__no,
  .page-disclaimer .rule-item__title,
  .page-disclaimer .rule-item__mark::before,
  .page-disclaimer .rule-item__mark::after,
  .page-disclaimer a {
    transition: none;
  }

  .page-disclaimer .contact-card:hover {
    transform: none;
  }
}