/* =========================================================================
   保合咨询 PowerHelm — sections.css
   理念 · IOE方法论 · 关于 · 历程 · 致辞 · 联系
   ========================================================================= */

/* 通用区块头 */
.sec-head { display: grid; gap: 1.2rem; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); max-width: 60ch; }
.sec-head__top { display: flex; align-items: baseline; gap: 1.2rem; }
.sec-head h2 { font-size: var(--t-h2); }
.sec-head .lead { margin-top: 0.5rem; }

/* ===================== 01 理念 ===================== */
.philosophy { position: relative; }
.philosophy__hex { position: absolute; right: var(--gutter); top: var(--space-section);
  opacity: 0.5; pointer-events: none; }
.phi-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
@media (max-width: 900px){ .phi-grid { grid-template-columns: 1fr; } }

.phi-pillars { display: grid; gap: 1.2rem; }
.phi-pillar {
  display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: start;
  padding: 1.8rem; border: 1px solid var(--line); background: color-mix(in oklab, var(--paper) 60%, white 8%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.phi-pillar:hover { border-color: var(--gold); transform: translateX(6px); box-shadow: var(--shadow-sm); }
.phi-pillar__glyph {
  font-family: var(--font-display); font-size: clamp(2.6rem, 3.5vw, 3.6rem); line-height: 0.9; font-weight: 500;
  color: var(--ink); position: relative;
}
.phi-pillar:nth-child(2) .phi-pillar__glyph { color: var(--gold-deep); }
.phi-pillar__en { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-mute); }
.phi-pillar h3 { font-family: var(--font-display); font-size: var(--t-h3); font-weight: 480; margin: 0.3rem 0 0.6rem; }
.phi-pillar p { font-size: var(--t-sm); color: var(--text-soft); }

.phi-aside { display: grid; gap: 1.6rem; align-content: start; }
.phi-intro { font-size: var(--t-base); color: var(--text-soft); }
.phi-credo {
  font-family: var(--font-display); font-size: var(--t-lead); line-height: 1.55; color: var(--ink);
  padding-left: 1.6rem; border-left: 2px solid var(--gold); font-weight: 440;
}

/* ===================== 02 IOE 方法论（深色满幅 · 视觉心脏） ===================== */
.method { background: var(--ink); color: var(--on-ink-text); position: relative; overflow: hidden; }
.method__glow { position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 50% at 80% 10%, color-mix(in oklab, var(--gold) 12%, transparent), transparent 60%),
              radial-gradient(60% 60% at 10% 90%, color-mix(in oklab, var(--teal) 14%, transparent), transparent 60%); }
.method .shell { position: relative; z-index: 1; }
.method .eyebrow { color: var(--gold-soft); }
.method .eyebrow::before { background: var(--gold-soft); }
.method .sec-no { color: var(--on-ink-mute); }
.method h2 { color: var(--on-ink-text); }
.method .lead { color: var(--on-ink-soft); }

.method__layout { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2.5rem, 5vw, 5rem); align-items: center; }
@media (max-width: 980px){ .method__layout { grid-template-columns: 1fr; } }

/* ---- 价值共生循环 环形 ---- */
.ioe-ring { position: relative; width: min(100%, 480px); aspect-ratio: 1; margin-inline: auto; }
.ioe-ring svg { width: 100%; height: 100%; overflow: visible; }
.ioe-arc { fill: none; stroke-width: 14; stroke-linecap: round; transition: stroke var(--dur), opacity var(--dur); cursor: pointer; }
.ioe-arc-bg { fill: none; stroke: var(--on-ink-line); stroke-width: 14; }
.ioe-ring .flow {
  fill: none; stroke: var(--teal-bright); stroke-width: 2.5; stroke-linecap: round;
  stroke-dasharray: 26 540; filter: drop-shadow(0 0 6px var(--teal-bright));
  animation: ioeFlow 6s linear infinite;
}
@keyframes ioeFlow { to { stroke-dashoffset: -566; } }

.ioe-ring__core { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; gap: 0.25rem; pointer-events: none; }
.ioe-ring__core b { font-family: var(--font-display); font-size: clamp(1.7rem, 3.5vw, 2.4rem); font-weight: 480; color: var(--on-ink-text); line-height: 1; }
.ioe-ring__core span { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.24em; text-transform: uppercase; color: var(--gold-soft); }
.ioe-ring__core em { font-style: normal; font-size: var(--t-sm); color: var(--on-ink-mute); margin-top: 0.4rem; max-width: 16ch; }

.ioe-node { position: absolute; transform: translate(-50%, -50%); display: grid; justify-items: center; gap: 0.1rem; cursor: pointer; }
.ioe-node b { font-family: var(--font-display); font-size: 1.4rem; color: var(--ink); width: 2.2em; height: 2.2em;
  display: grid; place-content: center; border-radius: 50%; background: var(--on-ink-text);
  transition: transform var(--dur) var(--ease), background var(--dur); box-shadow: 0 6px 18px rgba(0,0,0,.3); }
.ioe-node span { font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.18em; color: var(--on-ink-soft); text-transform: uppercase; }
.ioe-node[data-active="true"] b, .ioe-node:hover b { transform: scale(1.12); background: var(--gold); }

/* ---- 三柱详情面板 ---- */
.ioe-panels { position: relative; }
.ioe-tabs { display: flex; gap: 0.5rem; margin-bottom: 1.6rem; flex-wrap: wrap; }
.ioe-tab {
  font-family: var(--font-mono); font-size: var(--t-sm); letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.5em 1.1em; border: 1px solid var(--on-ink-line); border-radius: 100px; color: var(--on-ink-soft);
  transition: all var(--dur) var(--ease); display: inline-flex; align-items: center; gap: 0.5em;
}
.ioe-tab i { font-family: var(--font-display); font-style: normal; color: var(--gold-soft); }
.ioe-tab[aria-selected="true"] { background: var(--on-ink-text); color: var(--ink); border-color: var(--on-ink-text); }
.ioe-tab[aria-selected="true"] i { color: var(--gold-deep); }

.ioe-panel { display: none; animation: panelIn var(--dur) var(--ease); }
.ioe-panel.active { display: block; }
@keyframes panelIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

.ioe-panel__head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.9rem; }
.ioe-panel__zh { font-family: var(--font-display); font-size: var(--t-h3); color: var(--on-ink-text); font-weight: 480; }
.ioe-panel__word { font-family: var(--font-mono); font-size: var(--t-sm); letter-spacing: 0.2em; color: var(--gold-soft); }
.ioe-panel__sub { font-size: var(--t-sm); color: var(--on-ink-mute); }
.ioe-panel__tag { font-family: var(--font-display); font-size: var(--t-lead); color: var(--on-ink-text); line-height: 1.5; margin-bottom: 0.8rem; }
.ioe-panel__body { font-size: var(--t-sm); color: var(--on-ink-soft); margin-bottom: 1.5rem; max-width: 54ch; }

/* 字母框架链 */
.fw { margin-bottom: 1.6rem; }
.fw__label { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.2em; color: var(--on-ink-mute); text-transform: uppercase; margin-bottom: 0.8rem; }
.fw__chain { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.fw__step {
  display: inline-flex; align-items: center; gap: 0.5em; padding: 0.4em 0.7em 0.4em 0.4em;
  border: 1px solid var(--on-ink-line); border-radius: 100px; transition: all var(--dur) var(--ease);
}
.fw__step:hover { border-color: var(--gold-soft); background: color-mix(in oklab, var(--gold) 10%, transparent); }
.fw__step b { font-family: var(--font-mono); font-weight: 700; color: var(--ink); background: var(--gold-soft);
  width: 1.7em; height: 1.7em; border-radius: 50%; display: grid; place-content: center; font-size: 0.74rem; }
.fw__step span { font-size: 0.78rem; color: var(--on-ink-soft); }

.ioe-offerings { display: grid; gap: 0; border-top: 1px solid var(--on-ink-line); }
.ioe-offerings li { list-style: none; padding: 0.85rem 0; border-bottom: 1px solid var(--on-ink-line);
  font-size: var(--t-sm); color: var(--on-ink-text); display: flex; gap: 0.8em; align-items: baseline;
  transition: padding var(--dur) var(--ease), color var(--dur); }
.ioe-offerings li::before { content: "—"; color: var(--gold-soft); }
.ioe-offerings li:hover { padding-left: 0.6rem; color: var(--gold-soft); }

/* ===================== 03 关于 ===================== */
.about__lead { max-width: 80ch; }
.about__intro { font-size: var(--t-lead); color: var(--text-soft); line-height: 1.6; margin: 0; }

.vm { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line);
  border: 1px solid var(--line); margin-top: clamp(2.5rem, 5vw, 4rem); }
@media (max-width: 760px){ .vm { grid-template-columns: 1fr; } }
.vm__cell { background: var(--paper); padding: clamp(1.8rem, 4vw, 3rem); display: grid; gap: 1rem; position: relative; }
.vm__cell--mission { background: var(--ink); color: var(--on-ink-text); }
.vm__label { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.24em; text-transform: uppercase; color: var(--gold-deep); }
.vm__cell--mission .vm__label { color: var(--gold-soft); }
.vm__text { font-family: var(--font-display); font-size: var(--t-h3); line-height: 1.4; font-weight: 440; }

/* 价值观 */
.values { margin-top: clamp(3rem, 6vw, 5rem); }
.values__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 880px){ .values__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px){ .values__grid { grid-template-columns: 1fr; } }
.value { background: var(--paper); padding: 1.8rem 1.5rem; display: grid; gap: 0.7rem; align-content: start;
  transition: background var(--dur) var(--ease); min-height: 220px; }
.value:hover { background: color-mix(in oklab, var(--gold) 8%, var(--paper)); }
.value__no { font-family: var(--font-mono); font-size: var(--t-mono); color: var(--gold-deep); letter-spacing: 0.1em; }
.value h4 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 480; }
.value__en { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-mute); }
.value p { font-size: var(--t-sm); color: var(--text-soft); }

/* 团队 */
.team { margin-top: clamp(3rem, 6vw, 5rem); }
.team__head { display: grid; gap: 0.8rem; max-width: 56ch; margin-bottom: 2rem; }
.team__head h3 { font-family: var(--font-display); font-size: var(--t-h3); font-weight: 460; }
.team__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1rem, 2vw, 1.6rem); }
@media (max-width: 820px){ .team__grid { grid-template-columns: 1fr; } }
.team-card { padding: 1.8rem; border: 1px solid var(--line); display: grid; gap: 0.6rem; align-content: start;
  position: relative; overflow: hidden; transition: border-color var(--dur), transform var(--dur) var(--ease); }
.team-card::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--teal)); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease); }
.team-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.team-card:hover::before { transform: scaleX(1); }
.team-card__no { font-family: var(--font-mono); font-size: 1.6rem; color: var(--gold-deep); font-weight: 200; }
.team-card h4 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 480; }
.team-card__role { font-size: var(--t-sm); color: var(--gold-deep); }
.team-card p { font-size: var(--t-sm); color: var(--text-soft); }

/* ===================== 致辞 ===================== */
.letter { position: relative; }
.letter__inner { text-align: left; display: grid; gap: 1.5rem; position: relative; }
.letter__inner.card { max-width: min(100%, 60rem); margin-inline: auto;
  padding: clamp(7.8rem, 13.5vw, 13.2rem) clamp(1.8rem, 5vw, 5.2rem) clamp(5.2rem, 9vw, 8.8rem); }
.letter__eyebrow { justify-self: start; }
/* 正文限制为舒适阅读宽度；三支柱单独跨满整卡，制造横向节奏、压缩纵向高度 */
.letter__body { display: grid; gap: 1.2rem; }
.letter__body > :not(.letter-pillars) { max-width: 66ch; }
.letter__mark { font-family: var(--font-display); font-size: 4rem; line-height: 0.4; color: var(--gold); height: 1.5rem; opacity: 0.85; }
.letter__salutation { font-family: var(--font-display); font-size: clamp(1.05rem, 1rem + 0.5vw, 1.26rem); color: var(--ink); }
.letter__lead { font-size: var(--t-base); line-height: 1.82; color: var(--text-soft); }
.letter__para { font-size: var(--t-base); line-height: 1.82; color: var(--text-soft); }
.letter__bridge { color: var(--ink); }

/* 求衡 · 聚力 · 致远 —— 横向三支柱，呼应价值观/团队栅格 */
.letter-pillars {
  list-style: none; margin: 1rem 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.4rem, 3vw, 2.6rem);
}
.letter-pillar { display: grid; gap: 0.7rem; padding-top: 1rem; border-top: 2px solid var(--gold); }
.letter-pillar__term {
  font-family: var(--font-display); font-size: clamp(1.4rem, 1.1rem + 1vw, 1.85rem);
  font-weight: 500; color: var(--gold-deep); letter-spacing: 0.16em;
}
.letter-pillar__text { font-size: var(--t-sm); line-height: 1.72; color: var(--text-soft); }

/* 落款：左对齐顺承正文，"此致 / 敬礼" 不与正文割裂 */
.letter__valediction { font-family: var(--font-display); font-size: clamp(1.04rem, 1rem + 0.4vw, 1.22rem); color: var(--ink); margin-top: 0.7rem; }
.letter__salute { font-family: var(--font-display); font-size: clamp(1.04rem, 1rem + 0.4vw, 1.22rem); color: var(--ink); margin-top: 0.1rem; }
.letter__by { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-mute); margin-top: 0.6rem; }

@media (max-width: 760px){ .letter-pillars { grid-template-columns: 1fr; gap: 1rem; } }

/* ===================== 04 历程 ===================== */
.journey__wrap { position: relative; margin-top: clamp(2rem, 4vw, 3.5rem); }
.timeline { display: grid; gap: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: clamp(64px, 12vw, 130px); top: 0; bottom: 0; width: 1px; background: var(--line); }
.tl-item { display: grid; grid-template-columns: clamp(64px, 12vw, 130px) 1fr; gap: clamp(1.5rem, 3vw, 3rem);
  padding: 1.5rem 0; position: relative; align-items: baseline; }
.tl-item__year { font-family: var(--font-display); font-size: clamp(1.1rem, 0.8rem + 1vw, 1.6rem); color: var(--gold-deep); font-weight: 500; }
.tl-item__body { position: relative; padding-left: clamp(1.5rem, 3vw, 3rem); }
.tl-item__body::before { content: ""; position: absolute; left: calc(clamp(1.5rem, 3vw, 3rem) * -1 - 0.5px); top: 0.55em;
  transform: translateX(-50%); width: 11px; height: 11px; border-radius: 50%; background: var(--paper);
  border: 2px solid var(--line-strong); transition: border-color var(--dur), background var(--dur); }
.tl-item:hover .tl-item__body::before { border-color: var(--gold); background: var(--gold); box-shadow: 0 0 0 5px color-mix(in oklab, var(--gold) 18%, transparent); }
.tl-item__body p { font-size: var(--t-base); color: var(--text-soft); max-width: 60ch; }

/* ===================== 05 联系 ===================== */
.contact { background: var(--ink); color: var(--on-ink-text); position: relative; overflow: hidden; }
.contact__glow { position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(70% 60% at 80% 20%, color-mix(in oklab, var(--gold) 16%, transparent), transparent 60%),
              radial-gradient(70% 60% at 0% 100%, color-mix(in oklab, var(--teal) 14%, transparent), transparent 60%); }
.contact .shell { position: relative; z-index: 1; }
.contact .eyebrow { color: var(--gold-soft); }
.contact .eyebrow::before { background: var(--gold-soft); }
.contact__title { font-family: var(--font-display); font-size: var(--t-h2); color: var(--on-ink-text); font-weight: 440; line-height: 1.22; display: grid; gap: 0.1rem; }
.contact__title span { display: block; }
.contact__title span:last-child { color: var(--gold-soft); }
.contact__grid { display: grid; grid-template-columns: 1fr auto; gap: clamp(2rem, 5vw, 4.5rem); align-items: end; margin-top: clamp(2.5rem, 5vw, 4rem); }
@media (max-width: 760px){ .contact__grid { grid-template-columns: 1fr; align-items: start; } }
.contact__left { display: grid; gap: 2rem; align-content: end; }
.contact__info { display: grid; gap: 1.4rem; }

/* 二维码 + 手机图示 */
.contact__qr { display: grid; gap: 0.95rem; justify-items: center; margin: 0; }
@media (max-width: 760px){ .contact__qr { justify-items: start; } }
.contact__qr-card { background: #fff; padding: 12px; border-radius: 12px; box-shadow: var(--shadow); }
.contact__qr-card img { display: block; width: clamp(132px, 15vw, 168px); height: auto; border-radius: 5px; }
.contact__qr-cap { display: flex; align-items: center; gap: 0.65rem; }
.contact__phone { width: 20px; height: auto; color: var(--gold-soft); flex: none; }
.contact__qr-text { display: grid; gap: 0.1rem; }
.contact__qr-text b { font-weight: 500; font-size: 0.86rem; color: var(--on-ink-text); }
.contact__qr-text i { font-style: normal; font-size: 0.72rem; color: var(--on-ink-mute); }
.contact__item { display: grid; gap: 0.3rem; }
.contact__item dt { font-family: var(--font-mono); font-size: var(--t-mono); letter-spacing: 0.2em; text-transform: uppercase; color: var(--on-ink-mute); }
.contact__item dd { font-size: var(--t-base); color: var(--on-ink-text); }
.contact__item dd a { transition: color var(--dur); }
.contact__item dd a:hover { color: var(--gold-soft); }