/* ==========================================================================
   Osmosis Academics — 服务与费用 · styles.css
   视觉系统沿用官网 global.css(tokens / 字体三层 / 章节头 / 白板块 / reveal)
   禁止其他色相 · 禁止 border-radius · 禁止 box-shadow
   ========================================================================== */

:root {
  --bg:       #EFF3EE;
  --ink:      #17211C;
  --muted:    #6E7A72;
  --hairline: #D8E0D6;
  --accent:   #2F5243;
  --white:    #FFFFFF;
  --copy:     #3A4640;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4, h5, h6 { font-weight: 400; }
table { border-collapse: collapse; width: 100%; }

/* ---------- Fonts ---------- */
@font-face { font-family:'Athena'; src:url('fonts/athena.woff2') format('woff2'); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:'Athena'; src:url('fonts/athena-italic.woff2') format('woff2'); font-weight:400; font-style:italic; font-display:swap; }
@font-face { font-family:'Athena'; src:url('fonts/athena-bold.woff2') format('woff2'); font-weight:700; font-style:normal; font-display:swap; }
@font-face { font-family:'Athena'; src:url('fonts/athena-bolditalic.woff2') format('woff2'); font-weight:700; font-style:italic; font-display:swap; }
@font-face { font-family:'Noto Serif SC'; src:url('fonts/noto-serif-sc.woff2') format('woff2'); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:'Noto Serif SC'; src:url('fonts/noto-serif-sc-bold.woff2') format('woff2'); font-weight:700; font-style:normal; font-display:swap; }

/* ---------- Layout ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
@media (max-width: 768px) { .wrap { padding: 0 28px; } }
@media (max-width: 480px) { .wrap { padding: 0 20px; } }

/* ---------- 排版基类 ---------- */
.label {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 11px; letter-spacing: .3em; text-transform: uppercase; color: var(--muted);
}
.sec-head { display: flex; align-items: baseline; gap: 18px; padding: 64px 0 28px; }
.sec-head .num { font-family:'Athena', serif; font-size: 13px; letter-spacing: .2em; color: var(--muted); }
.sec-head h2 { font-size: 15px; letter-spacing: .3em; }
.sec-head i { font-family:'Athena', serif; font-style: italic; font-size: 13px; color: var(--muted); }
@media (max-width: 480px) { .sec-head { padding: 48px 0 20px; gap: 12px; flex-wrap: wrap; } }

.panel { background: var(--white); padding: 56px 60px; }
.panel + .panel { margin-top: 20px; }
@media (max-width: 768px) { .panel { padding: 40px 32px; } }
@media (max-width: 480px) { .panel { padding: 30px 22px; } }

.copy { font-size: 15.5px; line-height: 2.1; letter-spacing: .05em; color: var(--copy); max-width: 42em; }
.copy + .copy { margin-top: 1.2em; }
.copy--wide { max-width: 58em; }
.note { font-size: 13px; line-height: 2; letter-spacing: .04em; color: var(--muted); max-width: 52em; }
.note + .note { margin-top: .7em; }
em, .em { font-style: normal; color: var(--accent); }
strong { font-weight: 700; }

.panel-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 26px;
  padding-bottom: 18px; border-bottom: 1px solid var(--hairline); }
.panel-head h3 { font-size: 20px; letter-spacing: .12em; }
.panel-head .code { font-family:'Athena', serif; font-size: 13px; letter-spacing: .2em; color: var(--muted); }
.panel-head .en { font-family:'Athena', serif; font-style: italic; font-size: 13px; color: var(--muted); }
.panel-head .seat { margin-left: auto; }
@media (max-width: 600px) { .panel-head .seat { margin-left: 0; flex-basis: 100%; } }

/* 词典释义行 */
.dict {
  font-family:'Athena','Noto Serif SC','Songti SC','STSong',serif;
  font-style: italic; font-size: 15px; color: var(--muted); margin-bottom: 34px;
}
.dict b { font-style: normal; font-weight: 400; color: var(--ink); letter-spacing: .04em; }
.dict .ipa { font-style: normal; font-family:'Athena','Times New Roman','Noto Serif SC',serif; }
.dict .zh { font-style: normal; font-family:'Noto Serif SC','Songti SC','STSong',serif; }

/* 价格数字 */
.price { font-family:'Athena', serif; font-size: 30px; letter-spacing: .01em; color: var(--ink); }
.price small { font-family:'Noto Serif SC','Songti SC',serif; font-size: 12px; letter-spacing: .16em; color: var(--muted); margin-left: 8px; }
.num-a { font-family:'Athena', serif; letter-spacing: .01em; }

/* ---------- Nav ---------- */
.site-nav { display: flex; justify-content: space-between; align-items: baseline;
  padding: 34px 0 26px; gap: 20px; flex-wrap: wrap; }
.site-nav .mark { font-family:'Athena', serif; font-size: 21px; letter-spacing: .02em; }
.site-nav .mark span { font-family:'Noto Serif SC','Songti SC',serif; font-size: 12px;
  letter-spacing: .3em; color: var(--muted); margin-left: 14px; }
.site-nav .back { font-size: 13px; letter-spacing: .2em; color: var(--ink);
  border-bottom: 1px solid var(--hairline); padding-bottom: 5px; transition: border-color .2s ease, color .2s ease; }
.site-nav .back span { font-family:'Athena', serif; font-style: italic; font-size: 11px; color: var(--muted); margin-left: 6px; letter-spacing: .02em; }
.site-nav .back:hover, .site-nav .back:focus-visible { color: var(--accent); border-color: var(--accent); }
@media (max-width: 480px) { .site-nav .mark { font-size: 18px; } .site-nav .mark span { display: block; margin: 8px 0 0; } }

/* ---------- Hero ---------- */
.hero { padding: 44px 0 0; }
.hero h1 { font-size: clamp(46px, 8.6vw, 104px); line-height: 1.06; letter-spacing: .06em; }
.hero .h1-en { display: block; font-family:'Athena', serif; font-style: italic; font-weight: 400;
  font-size: clamp(20px, 3.2vw, 38px); letter-spacing: .01em; color: var(--muted); margin-top: 18px; }
.hero .eyebrow { margin-bottom: 30px; }
.hero .row { display: flex; justify-content: space-between; align-items: baseline; gap: 40px;
  margin-top: 44px; padding-bottom: 44px; border-bottom: 1px solid var(--hairline); }
.hero .stmt { font-size: 19px; line-height: 1.9; letter-spacing: .07em; max-width: 22em; }
@media (max-width: 900px) { .hero .row { flex-direction: column; gap: 22px; } }

/* ---------- 表格 ---------- */
.tbl-scroll { width: 100%; }
table caption { text-align: left; }
th, td { text-align: left; vertical-align: top; padding: 16px 20px 15px 0;
  border-bottom: 1px solid var(--hairline); font-size: 14.5px; line-height: 1.85; letter-spacing: .04em; color: var(--copy); }
th { font-weight: 400; color: var(--ink); }
thead th { font-family:'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 11px;
  letter-spacing: .22em; text-transform: uppercase; color: var(--muted); padding-bottom: 12px; }
thead th.zh { font-family:'Noto Serif SC','Songti SC',serif; font-size: 13px; letter-spacing: .2em;
  text-transform: none; color: var(--ink); }
tbody th { font-size: 14px; letter-spacing: .08em; white-space: nowrap; }
td:last-child, th:last-child { padding-right: 0; }
.t-num { font-family:'Athena', serif; font-size: 16px; color: var(--ink); }
.t-strong { color: var(--ink); }
.nw { white-space: nowrap; }
tr:last-child th, tr:last-child td { border-bottom: 0; }

/* 对照表:两档并列 */
.compare th:first-child { width: 22%; }
.compare td { width: 39%; }
.compare thead th.zh .sub { display: block; font-family:'Athena', serif; font-style: italic;
  font-size: 12px; letter-spacing: .02em; color: var(--muted); margin-top: 4px; }
.compare thead th.zh .head-price { font-family:'Athena', serif; font-style: normal; font-size: 26px;
  color: var(--ink); display: block; margin-top: 10px; letter-spacing: .01em; }

/* 总预算表 */
.budget th:first-child { width: 26%; }
.budget .t-num { font-size: 19px; }

/* 移动端表格 → 卡片 */
@media (max-width: 768px) {
  .stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .stack, .stack tbody, .stack tr, .stack th, .stack td { display: block; width: auto; }
  .compare.stack th:first-child, .budget.stack th:first-child,
  .compare.stack td, .budget.stack td { width: auto; }
  .stack tr { border-bottom: 1px solid var(--hairline); padding: 18px 0 14px; }
  .stack tr:last-child { border-bottom: 0; }
  .stack th, .stack td { border-bottom: 0; padding: 0; }
  .stack tbody th { white-space: normal; font-size: 15px; letter-spacing: .1em; margin-bottom: 8px; color: var(--ink); }
  .stack td { position: relative; padding: 7px 0 7px 0; font-size: 14px; }
  .stack caption { display: block; width: auto; padding-bottom: 12px; }
  .stack td::before {
    content: attr(data-label);
    display: block;
    font-family:'Noto Serif SC','Songti SC','STSong', serif;
    font-size: 11px; letter-spacing: .2em; color: var(--muted);
    margin-bottom: 3px;
  }
  .compare thead th.zh .head-price { font-size: 20px; }
}

/* ---------- 列表 ---------- */
.list { max-width: 52em; }
.list li { position: relative; padding: 13px 0 13px 26px; border-bottom: 1px solid var(--hairline);
  font-size: 14.5px; line-height: 1.95; letter-spacing: .04em; color: var(--copy); }
.list li:last-child { border-bottom: 0; }
.list li::before { content: '—'; position: absolute; left: 0; top: 13px; color: var(--muted); }
.list--wide { max-width: none; }

/* 定义式两列列表 */
.deflist { display: grid; grid-template-columns: 1fr; }
.deflist > div { display: grid; grid-template-columns: 12em 1fr; gap: 24px;
  padding: 15px 0; border-bottom: 1px solid var(--hairline); }
.deflist > div:last-child { border-bottom: 0; }
.deflist dt, .deflist .k { font-size: 14px; letter-spacing: .09em; color: var(--ink); }
.deflist dd, .deflist .v { font-size: 14.5px; line-height: 1.95; letter-spacing: .04em; color: var(--copy); }
@media (max-width: 600px) { .deflist > div { grid-template-columns: 1fr; gap: 6px; } }

/* ---------- 漏斗(05) ---------- */
.funnel { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.funnel .step { padding: 0 26px; border-left: 1px solid var(--hairline); }
.funnel .step:first-child { padding-left: 0; border-left: 0; }
.funnel .step:last-child { padding-right: 0; }
.funnel .stage { font-family:'Athena', serif; font-size: 12px; letter-spacing: .24em; color: var(--muted); }
.funnel h4 { font-size: 16px; letter-spacing: .1em; margin: 14px 0 10px; }
.funnel .amt { font-family:'Athena', serif; font-size: 22px; color: var(--accent); margin-bottom: 14px; }
.funnel p { font-size: 13.5px; line-height: 1.95; letter-spacing: .04em; color: var(--copy); }
@media (max-width: 900px) { .funnel { grid-template-columns: repeat(2, 1fr); row-gap: 34px; }
  .funnel .step:nth-child(3) { padding-left: 0; border-left: 0; } }
@media (max-width: 560px) { .funnel { grid-template-columns: 1fr; row-gap: 0; }
  .funnel .step { padding: 24px 0; border-left: 0; border-top: 1px solid var(--hairline); }
  .funnel .step:first-child { padding-top: 0; border-top: 0; } }

/* ---------- 卡片网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } .grid-2 { grid-template-columns: 1fr; } }
.card { background: var(--white); padding: 40px 38px; }
.card .code { font-family:'Athena', serif; font-size: 12px; letter-spacing: .22em; color: var(--muted); }
.card h4 { font-size: 17px; letter-spacing: .1em; margin: 12px 0 4px; }
.card .en { font-family:'Athena', serif; font-style: italic; font-size: 12px; color: var(--muted); }
.card .price { display: block; margin: 18px 0 16px; font-size: 26px; }
.card p { font-size: 13.5px; line-height: 1.95; letter-spacing: .04em; color: var(--copy); }
@media (max-width: 480px) { .card { padding: 28px 22px; } }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--hairline); }
.faq .qa { border-bottom: 1px solid var(--hairline); padding: 28px 0; display: grid;
  grid-template-columns: 3.2em 1fr; gap: 0 20px; }
.faq .qn { font-family:'Athena', serif; font-size: 13px; letter-spacing: .18em; color: var(--muted); padding-top: 4px; }
.faq h4 { font-size: 16.5px; line-height: 1.75; letter-spacing: .08em; }
.faq p { grid-column: 2; margin-top: 12px; font-size: 14.5px; line-height: 2.05;
  letter-spacing: .04em; color: var(--copy); max-width: 46em; }
@media (max-width: 560px) { .faq .qa { grid-template-columns: 1fr; }
  .faq .qn { padding: 0 0 8px; } .faq p { grid-column: 1; } }

/* ---------- 联系 ---------- */
.contact-cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
.contact-cols h4 { font-size: 13px; letter-spacing: .25em; margin-bottom: 14px; }
.contact-cols p { font-family:'Noto Serif SC','Songti SC','STSong', serif; font-size: 12.5px;
  line-height: 2.05; color: var(--muted); letter-spacing: .06em; }
@media (max-width: 768px) { .contact-cols { grid-template-columns: 1fr 1fr; row-gap: 30px; } }
@media (max-width: 420px) { .contact-cols { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.site-footer { margin-top: 90px; border-top: 1px solid var(--hairline); padding: 54px 0 70px; }
.site-footer .fmark { font-family:'Athena', serif; font-size: 26px; }
.site-footer .fcn { font-size: 12px; letter-spacing: .3em; color: var(--muted); margin-top: 10px; }
.site-footer .legal { margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--hairline);
  font-size: 13px; line-height: 2.05; letter-spacing: .04em; color: var(--copy); max-width: 48em; }
.site-footer .copyline { margin-top: 26px; font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 11px; letter-spacing: .18em; color: var(--muted); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .site-nav .back { transition: none; }
}

/* ---------- 焦点 ---------- */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 主体节奏 ---------- */
main { padding-bottom: 20px; }
.sec-lead { margin-bottom: 22px; }
.subhead { font-size: 13px; letter-spacing: .26em; color: var(--muted);
  margin: 40px 0 18px; padding-top: 26px; border-top: 1px solid var(--hairline); }
.panel > .subhead:first-child { margin-top: 0; padding-top: 0; border-top: 0; }

/* ---------- 发布闸门提示(信息填写完成后连同 HTML 区块一并删除) ---------- */
.prepub {
  margin-top: 22px; padding: 13px 18px;
  border: 1px solid var(--hairline); background: var(--white);
  font-size: 12.5px; line-height: 1.9; letter-spacing: .08em; color: var(--accent);
}

/* 待填写占位 */
.pending { color: var(--accent); letter-spacing: .1em; }
.pending::before { content: '['; }
.pending::after { content: ']'; }

/* 页脚经营主体信息 */
.site-footer .entity { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--hairline); max-width: 48em; }
.site-footer .entity p { display: grid; grid-template-columns: 11em 1fr; gap: 18px;
  padding: 6px 0; font-size: 12.5px; line-height: 1.95; letter-spacing: .05em; color: var(--copy); }
.site-footer .entity .k { color: var(--muted); letter-spacing: .18em; font-size: 11.5px; }
@media (max-width: 600px) { .site-footer .entity p { grid-template-columns: 1fr; gap: 2px; } }

/* 移动端两档价格键(桌面由表头承载,此处仅在 stack 模式出现一次) */
.stack-key { display: none; }
@media (max-width: 768px) {
  .stack-key { display: flex; gap: 26px; flex-wrap: wrap; margin-bottom: 18px;
    padding-bottom: 14px; border-bottom: 1px solid var(--hairline);
    font-size: 13px; letter-spacing: .08em; color: var(--muted); }
  .stack-key b { font-family:'Athena', serif; font-weight: 400; font-size: 19px; color: var(--ink); }
}

/* ---------- 打印 / 另存 PDF ---------- */
@media print {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  html, body { background: #FFFFFF; }
  .wrap { max-width: none; padding: 0 14mm; }
  .site-nav .back, .prepub { display: none; }
  .panel, .card { break-inside: auto; page-break-inside: auto; }
  .sec-head, .panel-head, .subhead { break-after: avoid; page-break-after: avoid; }
  .faq .qa, .funnel .step, .deflist > div, tr, .list li { break-inside: avoid; page-break-inside: avoid; }
  .sec-head { padding-top: 34px; }
  .hero { padding-top: 0; }
  .site-footer { margin-top: 40px; }
  a[href^="http"]::after { content: ''; }
}