/* 節約の虎の巻｜コラムハブ＆記事 共有スタイル
   本サイトの配色（濃紺・青・黄）を踏襲。黄色はアクセント限定。 */
:root{
  --navy:#0b2a6b; --navy-deep:#041f4d; --blue:#1a56db; --sky:#3b82f6;
  --yellow:#fcd34d; --yellow-deep:#f59e0b; --ink:#14202b; --paper:#f6f8fb;
  --line:#e6e8ec; --muted:#5c6b7a; --bluegrey:#eef2f7;
}
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{ font-family:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN",sans-serif; color:var(--ink); background:#fff; line-height:1.85; -webkit-font-smoothing:antialiased; overflow-x:hidden; }
.serif{ font-family:"Noto Serif JP","Hiragino Mincho ProN",serif; }
.bebas{ font-family:"Bebas Neue",sans-serif; letter-spacing:.05em; }
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }

/* 共通ヘッダー / フッター */
.topbar{ background:var(--navy-deep); color:#fff; font-size:11px; letter-spacing:.05em; padding:6px 0; }
.topbar-inner{ max-width:1200px; margin:0 auto; padding:0 24px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px; }
.topbar a{ opacity:.85; } .topbar a:hover{ opacity:1; }
.site-header{ background:#fff; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:100; backdrop-filter:saturate(180%) blur(20px); }
.header-inner{ max-width:1200px; margin:0 auto; padding:14px 24px; display:flex; align-items:center; justify-content:space-between; gap:20px; }
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{ width:42px; height:42px; background:var(--navy); border-radius:8px; display:flex; align-items:center; justify-content:center; color:var(--yellow); font-family:"Bebas Neue",sans-serif; font-size:22px; }
.brand-text .name{ font-weight:900; font-size:16px; color:var(--navy); }
.brand-text .sub{ font-size:10px; color:var(--ink); opacity:.6; letter-spacing:.1em; margin-top:2px; }
.brand-logo{ height:46px; width:auto; max-width:min(72vw,320px); display:block; }
.brand-fallback{ display:none; align-items:center; gap:12px; }
.gnav{ display:flex; gap:24px; align-items:center; }
.gnav a{ font-size:13px; font-weight:500; color:var(--ink); } .gnav a:hover{ color:var(--blue); }
.gnav .cta-mini{ background:var(--navy); color:#fff; padding:10px 20px; border-radius:4px; font-size:13px; font-weight:700; }
.gnav .cta-mini:hover{ background:var(--blue); }
@media(max-width:900px){ .gnav a:not(.cta-mini){ display:none; } }
.footer{ background:var(--navy-deep); color:#fff; padding:64px 0 32px; }
.footer-inner{ max-width:1200px; margin:0 auto; padding:0 24px; }
.footer-grid{ display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:32px; margin-bottom:48px; }
@media(max-width:900px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media(max-width:560px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-brand .name{ font-family:"Noto Serif JP",serif; font-size:20px; font-weight:800; color:#fff; margin-bottom:6px; }
.footer-brand .desc{ font-size:12px; opacity:.7; line-height:1.8; margin-bottom:16px; }
.footer h4{ font-size:12px; color:var(--yellow); letter-spacing:.15em; margin-bottom:16px; font-weight:700; }
.footer ul{ list-style:none; } .footer ul li{ margin-bottom:10px; }
.footer ul a{ font-size:13px; opacity:.8; } .footer ul a:hover{ opacity:1; color:var(--yellow); }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.1); padding-top:24px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:11px; opacity:.6; }
.rdn-fab{ position:fixed; right:16px; bottom:16px; z-index:9999; }
.rdn-fab a{ display:inline-flex; align-items:center; gap:8px; padding:14px 22px; border-radius:999px; font-weight:800; font-size:15px; color:#fff; background:#06C755; box-shadow:0 12px 30px rgba(6,199,85,.45); }

/* 共通見出し装飾（小さな黄色ライン） */
.eyebrow{ font-family:"Bebas Neue",sans-serif; letter-spacing:.3em; color:var(--blue); font-size:13px; margin-bottom:8px; }
.h-line{ display:inline-block; }
h2.sec{ font-family:"Noto Serif JP",serif; font-weight:800; font-size:clamp(22px,3.2vw,30px); color:var(--navy); line-height:1.45; position:relative; padding-left:14px; margin:0 0 8px; }
h2.sec::before{ content:""; position:absolute; left:0; top:.2em; bottom:.2em; width:5px; background:var(--yellow); border-radius:3px; }
.sec-note{ font-size:14px; color:#3a4656; max-width:760px; margin-bottom:26px; }

/* ==== HUB ==== */
.wrap{ max-width:1200px; margin:0 auto; padding:0 24px; }
.hub-breadcrumb{ max-width:1200px; margin:0 auto; padding:14px 24px; font-size:12px; color:var(--muted); }
.hub-breadcrumb ol{ list-style:none; display:flex; gap:6px; flex-wrap:wrap; }
.hub-breadcrumb a{ color:var(--muted); }
.hub-breadcrumb li:not(:last-child)::after{ content:"›"; margin-left:6px; color:#aaa; }

.hub-hero{ position:relative; overflow:hidden; background:linear-gradient(120deg,#fff 0%,#fff 46%,#fbf3dc 100%); border-bottom:1px solid var(--line); }
.hub-hero .in{ max-width:1200px; margin:0 auto; padding:56px 24px; position:relative; z-index:1; }
.hub-hero .kicker{ font-family:"Bebas Neue",sans-serif; letter-spacing:.32em; color:var(--yellow-deep); font-size:14px; }
.hub-hero h1{ font-family:"Noto Serif JP",serif; font-weight:900; font-size:clamp(28px,4.6vw,44px); color:var(--navy); margin:8px 0 12px; line-height:1.3; }
.hub-hero p{ font-size:15px; color:#3a4656; max-width:640px; }
.hub-hero .small{ font-size:13px; color:var(--muted); margin-top:8px; }
.hub-hero .art{ position:absolute; right:-30px; bottom:-30px; width:320px; opacity:.5; z-index:0; }
@media(max-width:760px){ .hub-hero .art{ display:none; } }

.sec-pad{ padding:56px 0; }
.sec-bg{ background:var(--bluegrey); }

/* 注目記事 */
.feature-grid{ display:grid; grid-template-columns:1.6fr 1fr; gap:18px; margin-top:8px; }
@media(max-width:820px){ .feature-grid{ grid-template-columns:1fr; } }
.side-stack{ display:grid; gap:18px; }
.acard{ display:flex; flex-direction:column; background:#fff; border:1px solid var(--line); border-radius:12px; overflow:hidden; box-shadow:0 2px 4px rgba(14,39,69,.04); transition:transform .2s, box-shadow .2s, border-color .2s; }
.acard:hover{ transform:translateY(-3px); box-shadow:0 20px 44px -26px rgba(14,39,69,.3); border-color:#d3dde9; }
.acard .thumb{ aspect-ratio:16/10; position:relative; display:flex; align-items:center; justify-content:center; }
.acard.big .thumb{ aspect-ratio:16/9; }
.acard .thumb .ico{ width:64px; height:64px; opacity:.9; }
.acard .thumb .chip{ position:absolute; left:12px; top:12px; background:rgba(255,255,255,.92); color:var(--navy); font-size:11px; font-weight:700; letter-spacing:.06em; padding:4px 10px; border-radius:4px; }
.acard .body{ padding:18px 20px; display:flex; flex-direction:column; flex:1; }
.acard .meta{ font-size:11.5px; color:var(--muted); margin-bottom:8px; display:flex; gap:12px; flex-wrap:wrap; }
.acard h3{ font-size:17px; font-weight:800; color:var(--navy); line-height:1.55; margin-bottom:8px; }
.acard.big h3{ font-size:22px; }
.acard p{ font-size:13px; color:#4a5563; line-height:1.85; flex:1; }
.acard .more{ margin-top:14px; font-size:13px; font-weight:700; color:var(--blue); display:inline-flex; align-items:center; gap:6px; }
.acard:hover .more::after{ content:"→"; }

/* カテゴリ別の淡色サムネ（写真が無くても空欄にしない） */
.th-window{ background:linear-gradient(150deg,#dbeafe,#eff6ff); }
.th-propane{ background:linear-gradient(150deg,#fef3c7,#fffbeb); }
.th-heater{ background:linear-gradient(150deg,#cffafe,#ecfeff); }
.th-ecocute{ background:linear-gradient(150deg,#dcfce7,#f0fdf4); }
.th-subsidy{ background:linear-gradient(150deg,#ede9fe,#f5f3ff); }
.th-window .ico{ color:#2563eb; } .th-propane .ico{ color:#d97706; }
.th-heater .ico{ color:#0891b2; } .th-ecocute .ico{ color:#16a34a; } .th-subsidy .ico{ color:#7c3aed; }

/* お困りごとから探す */
.trouble-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:14px; margin-top:8px; }
@media(max-width:900px){ .trouble-grid{ grid-template-columns:1fr 1fr 1fr; } }
@media(max-width:560px){ .trouble-grid{ grid-template-columns:1fr 1fr; } }
.tcard{ background:#fff; border:1px solid var(--line); border-radius:12px; padding:20px 16px; text-align:center; cursor:pointer; transition:transform .2s, box-shadow .2s, border-color .2s; }
.tcard:hover,.tcard.active{ transform:translateY(-3px); box-shadow:0 16px 36px -22px rgba(14,39,69,.3); border-color:var(--blue); }
.tcard .ci{ width:46px; height:46px; border-radius:50%; margin:0 auto 10px; display:flex; align-items:center; justify-content:center; }
.tcard .ci svg{ width:24px; height:24px; }
.tcard .t{ font-size:13.5px; font-weight:800; color:var(--navy); }
.tcard .d{ font-size:11px; color:var(--muted); line-height:1.6; margin-top:5px; }

/* 一覧フィルタ */
.filter-row{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:22px; }
.fbtn{ border:1px solid var(--line); background:#fff; color:var(--navy); font-size:13px; font-weight:700; padding:8px 16px; border-radius:999px; cursor:pointer; }
.fbtn.on{ background:var(--navy); color:#fff; border-color:var(--navy); }
.list-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
@media(max-width:900px){ .list-grid{ grid-template-columns:1fr 1fr; } }
@media(max-width:560px){ .list-grid{ grid-template-columns:1fr; } }

/* 動画 */
.vid-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:8px; }
@media(max-width:820px){ .vid-grid{ grid-template-columns:1fr; } }
.vcard .fr{ aspect-ratio:16/9; border-radius:12px; overflow:hidden; background:#000; position:relative; cursor:pointer; box-shadow:0 14px 34px -20px rgba(11,42,107,.4); }
.vcard .fr img{ width:100%; height:100%; object-fit:cover; }
.vcard .fr .play{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; background:rgba(4,31,77,.32); }
.vcard .fr .play span{ width:60px; height:60px; border-radius:50%; background:var(--yellow); color:var(--navy-deep); display:flex; align-items:center; justify-content:center; }
.vcard .fr .play svg{ width:26px; height:26px; margin-left:3px; }
.vcard .cap{ margin-top:10px; font-size:13.5px; font-weight:700; color:var(--navy); }
.vid-more{ text-align:center; margin-top:26px; }

/* CTA */
.hub-cta{ position:relative; color:#fff; background:linear-gradient(120deg,#0b2a6b,#041f4d); overflow:hidden; }
.hub-cta::before{ content:""; position:absolute; inset:0; opacity:.08; background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px); background-size:44px 44px; }
.hub-cta .in{ position:relative; z-index:1; max-width:900px; margin:0 auto; padding:72px 24px; text-align:center; }
.hub-cta h2{ font-family:"Noto Serif JP",serif; font-weight:800; font-size:clamp(22px,3.4vw,32px); line-height:1.5; margin-bottom:12px; }
.hub-cta p{ font-size:14.5px; opacity:.92; margin-bottom:26px; }
.hub-cta .btns{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }
.hub-cta .b{ display:inline-flex; align-items:center; gap:9px; padding:15px 30px; border-radius:8px; font-weight:800; font-size:15px; }
.hub-cta .b-line{ background:#06C755; color:#fff; } .hub-cta .b-form{ background:var(--yellow); color:var(--navy-deep); }

/* ==== 記事ページ ==== */
.article-head{ background:var(--bluegrey); border-bottom:1px solid var(--line); }
.article-head .in{ max-width:820px; margin:0 auto; padding:40px 24px 34px; }
.article-head .chip{ display:inline-block; background:#fff; border:1px solid var(--line); color:var(--navy); font-size:11.5px; font-weight:700; padding:4px 12px; border-radius:999px; }
.article-head h1{ font-family:"Noto Serif JP",serif; font-weight:900; font-size:clamp(23px,3.6vw,34px); color:var(--navy); line-height:1.5; margin:14px 0 12px; }
.article-head .meta{ font-size:12px; color:var(--muted); display:flex; gap:14px; flex-wrap:wrap; }
.article-body{ max-width:760px; margin:0 auto; padding:44px 24px; font-size:15.5px; }
.article-body h2{ font-family:"Noto Serif JP",serif; font-size:21px; color:var(--navy); font-weight:800; margin:36px 0 12px; padding-left:12px; border-left:5px solid var(--yellow); line-height:1.5; }
.article-body h3{ font-size:16px; color:var(--navy); font-weight:700; margin:22px 0 8px; }
.article-body p{ margin:0 0 14px; line-height:1.95; color:#26313c; }
.article-body ul,.article-body ol{ margin:0 0 16px 0; padding-left:0; list-style:none; }
.article-body ul li{ position:relative; padding:6px 0 6px 28px; line-height:1.8; }
.article-body ul li::before{ content:"✓"; position:absolute; left:0; color:var(--yellow-deep); font-weight:900; }
.article-body ol{ counter-reset:n; }
.article-body ol li{ position:relative; padding:6px 0 6px 34px; line-height:1.8; }
.article-body ol li::before{ counter-increment:n; content:counter(n); position:absolute; left:0; top:6px; width:24px; height:24px; background:var(--navy); color:#fff; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:700; }
.lead{ font-size:16px; line-height:1.95; color:#1c2833; background:#fff; border:1px solid var(--line); border-left:4px solid var(--blue); border-radius:8px; padding:18px 20px; margin-bottom:8px; }
.callout{ background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:20px 22px; margin:22px 0; }
.callout h3{ margin-top:0; color:var(--navy); }
.faq-q{ font-weight:700; color:var(--navy); margin:16px 0 4px; padding-left:26px; position:relative; }
.faq-q::before{ content:"Q"; position:absolute; left:0; color:var(--yellow-deep); font-weight:900; }
.faq-a{ padding-left:26px; position:relative; color:#26313c; }
.faq-a::before{ content:"A"; position:absolute; left:0; color:var(--blue); font-weight:900; }
.article-video{ aspect-ratio:16/9; border-radius:12px; overflow:hidden; background:#000; position:relative; cursor:pointer; margin:18px 0; }
.article-video img{ width:100%; height:100%; object-fit:cover; }
.article-video .play{ position:absolute; inset:0; display:flex; align-items:center; justify-content:center; background:rgba(4,31,77,.32); }
.article-video .play span{ width:60px; height:60px; border-radius:50%; background:var(--yellow); color:var(--navy-deep); display:flex; align-items:center; justify-content:center; }
.article-video .play svg{ width:26px; height:26px; margin-left:3px; }
.article-info{ font-size:12px; color:var(--muted); border-top:1px solid var(--line); margin-top:34px; padding-top:18px; line-height:1.9; }
.article-info a{ color:var(--blue); text-decoration:underline; }
.article-cta{ background:linear-gradient(120deg,#0b2a6b,#041f4d); color:#fff; border-radius:14px; padding:30px 26px; margin:34px 0 0; text-align:center; }
.article-cta h3{ font-family:"Noto Serif JP",serif; font-size:19px; margin-bottom:8px; color:#fff; }
.article-cta p{ font-size:13.5px; opacity:.9; margin-bottom:18px; }
.article-cta .btns{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }
.article-cta .b{ display:inline-flex; align-items:center; gap:8px; padding:14px 26px; border-radius:8px; font-weight:800; font-size:14.5px; }
.article-cta .b-line{ background:#06C755; color:#fff; } .article-cta .b-form{ background:var(--yellow); color:var(--navy-deep); }
.article-back{ max-width:760px; margin:0 auto; padding:0 24px 40px; }
.article-back a{ color:var(--blue); font-weight:700; font-size:14px; }
.related{ max-width:760px; margin:0 auto; padding:0 24px 20px; }
.related h3{ font-size:14px; color:var(--navy); margin-bottom:10px; }
.related a{ display:inline-block; color:var(--blue); font-weight:700; font-size:14px; margin:3px 14px 3px 0; }