/* 卖点四宫格 */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding-bottom: 80px; }
.feature { background: var(--card); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 22px; }
.feature .fi { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px; }
.feature h3 { font-size: 16px; margin-bottom: 4px; }
.feature p { font-size: 13px; color: var(--muted); }

/* 区块标题 */
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 26px; }
.sec-head h2 { font-size: 34px; font-weight: 900; display: flex; align-items: center; gap: 6px; }
.sec-head h2 .star { color: var(--coral); }
.sec-head p { color: var(--muted); font-size: 14px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters button { padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 700; border: 1.5px solid var(--border); background: var(--card); }
.filters button.on { background: var(--coral-strong); border-color: var(--coral-strong); color: #fff; }

/* 商品网格 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.pcard { border-radius: 28px; padding: 22px; display: flex; flex-direction: column; min-height: 300px; position: relative; }
.pcard.span2 { grid-column: span 2; }
.pcard .tag {
  position: absolute; top: 18px; right: 18px;
  font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  background: var(--card); border: 1.5px solid var(--edge); box-shadow: 0 2px 0 var(--edge);
  transform: rotate(3deg);
}
.pcard .pico {
  width: 54px; height: 54px; border-radius: 16px; background: var(--card);
  display: grid; place-items: center; font-weight: 900; font-size: 15px;
  box-shadow: 0 2px 0 rgba(0,0,0,.06);
}
.pcard h3 { font-size: 22px; margin-top: 16px; }
.pcard .sub { font-size: 13px; color: var(--muted); }
.pcard .foot { margin-top: auto; padding-top: 18px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.pcard .big { font-size: 28px; font-weight: 900; }
.pcard .big small { font-size: 13px; font-weight: 600; color: var(--muted); margin-left: 4px; }
.round-go { width: 40px; height: 40px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; transition: transform .15s; }
.round-go:hover { transform: rotate(-30deg); }

/* ChatGPT 大卡里的套餐格子 */
.tiers { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 16px; }
.tier {
  text-align: left; background: color-mix(in srgb, var(--card) 72%, transparent);
  border: 1.5px solid transparent; border-radius: 16px; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 2px; transition: border-color .15s, transform .15s;
}
.tier:hover { border-color: var(--edge); transform: translateY(-2px); }
.tier .tn { font-weight: 800; font-size: 14px; display: flex; gap: 6px; align-items: center; }
.tier .tn em { font-style: normal; font-size: 11px; padding: 1px 7px; border-radius: 999px; background: var(--coral-strong); color: #fff; }
.tier .td { font-size: 12px; color: var(--muted); }
.tier .tp { margin-top: 6px; font-weight: 900; font-size: 18px; }
.tier .tp small { font-size: 12px; color: var(--muted); font-weight: 600; }

.pcard.soon { opacity: .75; }
.pcard.soon .round-go { background: var(--muted); cursor: not-allowed; }
.pcard.ask { border: 2px dashed var(--dash); background: transparent; justify-content: center; align-items: center; text-align: center; }
.pcard.ask .q { width: 54px; height: 54px; border-radius: 50%; background: var(--sun); color: #201c30; display: grid; place-items: center; font-size: 24px; font-weight: 900; margin-bottom: 8px; }
.empty { display: none; text-align: center; color: var(--muted); padding: 40px 0; }

/* 四步流程 */
.steps-sec { padding: 90px 0 40px; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { position: relative; padding: 24px 22px; border-radius: var(--radius); background: var(--card); border: 1.5px solid var(--border); }
.step .n { width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-weight: 900; margin-bottom: 14px; }
.step h3 { font-size: 16px; }
.step p { font-size: 13px; color: var(--muted); }

/* 客服区 */
.help { margin: 70px 0 60px; padding: 36px; border-radius: 30px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 30px; align-items: center; }
.help h2 { font-size: 32px; line-height: 1.25; font-weight: 900; }
.help h2 span { color: var(--coral); }
.help p { color: var(--muted); font-size: 14px; margin-top: 10px; }
.contacts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.contact { padding: 16px; border-radius: 18px; background: var(--bg); border: 1.5px solid var(--border); }
.contact small { color: var(--muted); font-size: 12px; display: block; }
.contact strong { font-size: 15px; word-break: break-all; }

.footer { border-top: 1.5px solid var(--border); padding: 26px 0 40px; font-size: 12px; color: var(--muted); }
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* 右下角浮动客服 */
.fab { position: fixed; right: 20px; bottom: 20px; z-index: 40; padding: 10px 16px; border-radius: 999px; display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; }